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Reflection and Refraction mcq Class 10 with Answers PDF for Students
A concave mirror has a curvature radius of 30 cm. An object is positioned 15 cm in front of its pole along the principal axis. Identify the correct option describing the image’s location, size, and nature.
a) Behind the mirror, enlarged, virtual, and upright
b) At infinity, highly magnified, real, and inverted
c) Between the focus and the centre of curvature, reduced, real, and inverted
d) At the focus, extremely small (point-like), real, and inverted
Option a – Behind the mirror, enlarged, virtual, and upright
In Optics, which term denotes the lens-diaphragm opening that controls the passage of Light?
a) Aperture
b) Collimator
c) Meniscus
d) Apostilb
Option a – Aperture
White Light is an example of
a) Laser Light
b) Plane-polarized Light
c) Monochromatic Light
d) Polychromatic Light
Option d – Polychromatic Light
Which telescope, invented by Isaac Newton in the 17th century, used a concave mirror instead of a simple lens to gather Light and avoid chromatic dispersion?
a) Infrared telescope
b) Reflecting telescope
c) Monocular telescope
d) Graphic telescope
Option b – Reflecting telescope
Which colour in the VIBGYOR Spectrum possesses the lowest energy?
a) Violet
b) Green
c) Yellow
d) Red
Option d – Red
Determine the focal length of a convex lens with a power of +2.5 diopters.
a) 20 cm
b) 10 cm
c) 40 cm
d) 5 cm
Option c – 40 cm
Raman plans to install a rear-view mirror in his car. Which type of mirror should he use?
a) Plane mirror
b) Convex mirror
c) Concave mirror
d) Cylindrical mirror
Option b – Convex mirror
The image produced by a convex mirror is always
a) Real and upright
b) Virtual and inverted
c) Real and inverted
d) Virtual and upright
Option d – Virtual and upright
Which statements about lens power are accurate? I. A convex lens has positive power. II. A concave lens has negative power.
a) Only I
b) Only II
c) Both I and II
d) Neither I nor II
Option c – Both I and II
Identify the incorrect pair of object position – image position – image size for a concave mirror.
a) At focus – At infinity – Highly magnified
b) Between centre and focus – Beyond centre – Enlarged
c) Beyond centre – Between focus and centre – Diminished
d) At infinity – At centre – Highly diminished
Option d – At infinity – At centre – Highly diminished
If u represents the object distance, v the image distance, and f the focal length of a spherical mirror, which equation expresses the mirror formula correctly?
a) 1/v − 1/u = 1/f
b) 1/v + 1/u = −1/f
c) 1/v − 1/u = −1/f
d) 1/v + 1/u = 1/f
Option d – 1/v + 1/u = 1/f
The separation of white Light into its constituent colours is called
a) Refraction
b) Reflection
c) Dispersion
d) Scattering
Option c – Dispersion
Reflection seen on a bathroom mirror, calm water surface, or eyeglass glare is an example of
a) Specular reflection
b) Multiple reflection
c) Diffused reflection
d) Glossy reflection
Option a – Specular reflection
Which element is unsuitable for manufacturing a Light-emitting diode (LED)?
a) Indium gallium nitride
b) Gallium phosphide
c) Gallium arsenide
d) Germanium
Option b – Gallium phosphide
Gold and copper absorb yellow and violet wavelengths, reflecting which colour?
a) Green
b) Blue
c) Red
d) Orange
Option b – Blue
The absolute refractive index of diamond is
a) Air
b) Diamond
c) Crown glass
d) Water
Option a – Air
Besides red and green light, which wavelength of sunlight is absorbed by ocean water molecules?
a) Yellow
b) Blue
c) Violet
d) Orange
Option c – Violet
Which mirror type produces lateral inversion of light?
a) Plane mirror
b) Concave mirror
c) Convex mirror
d) Rectangular mirror
Option c – Convex mirror
The blue colour of the clear sky results from
a) Refraction of light
b) Reflection of light
c) Scattering of light
d) Dispersion of light
Option c – Scattering of light
What is the full form of LED?
a) Light Emitting Device
b) Light Emitting Diode
c) Linear Emergency Device
d) Liquid Emitting Display
Option b – Light Emitting Diode
Which phenomenon describes the scattering of light by molecules when they are excited to vibrational energy states?
a) Huygens effect
b) Maxwell effect
c) Raman effect
d) Rayleigh effect
Option d – Rayleigh effect
The change in the path of light when it travels from one medium to another is known as
a) Obstruction
b) Reflection
c) Diffraction
d) Refraction
Option d – Refraction
A convex lens has a focal length of 15 cm. At what distance should an object be placed so that a real image of the same size is formed?
a) 10 cm
b) 15 cm
c) 40 cm
d) 30 cm
Option d – 30 cm
If a lens produces a magnification of +2, the image formed will be:
a) Upright, virtual, and smaller than the object
b) Inverted, real, and smaller than the object
c) Upright, virtual, and larger than the object
d) Inverted, real, and larger than the object
Option c – Upright, virtual, and larger than the object
When an object is located at the focal point of a convex lens, where will its image appear?
a) At the focal point on the same side as the object
b) At the focal point on the opposite side
c) Coinciding with the lens
d) At infinity
Option d – At infinity
Which of the following correctly describes the aperture of a convex lens?
a) Equal to the radius of curvature
b) Equal to the focal length
c) Independent of the radius of curvature
d) Equal to half of the focal length
Option c – Independent of the radius of curvature
What is the power of a lens with a focal length of 10 cm?
a) 1 dioptre
b) 0.1 dioptre
c) 10 dioptres
d) 100 dioptres
Option c – 10 dioptres
Light waves can be described as:
a) Mechanical in nature
b) Progressive in nature
c) Longitudinal waves
d) Transverse waves
Option d – Transverse waves
Which of the following is a non-luminous object?
a) Sun
b) Candle
c) LED bulb
d) Moon
Option d – Moon
The SI unit used to measure lens power is:
a) Size of the lens
b) Curvature of the lens
c) Lens power
d) Magnification produced by the lens
Option c – Lens power
An image produced by a plane mirror is:
a) Always virtual and upright
b) Always virtual but may be upright or inverted depending on the object
c) Never virtual but always upright
d) Always real and upright
Option a – Always virtual and upright
Find the effective focal length for two lenses with powers of +2.5 D and −2.0 D.
a) −0.5 m
b) +0.5 m
c) +2.0 m
d) −2.0 m
Option c – +2.0 m
Which phenomenon proves that light behaves as a transverse wave?
a) Diffraction
b) Refraction
c) Polarization
d) Interference
Option c – Polarization
Ramesh cannot see objects clearly beyond 2 m. Which lens power can correct his vision?
a) −0.2 D
b) −0.5 D
c) +0.2 D
d) +0.5 D
Option b – −0.5 D
When light passes from air into glass, some waves are reflected and some are refracted. Which property of the wave remains constant?
a) Direction
b) Speed
c) Brightness
d) Frequency
Option d – Frequency
If a light ray enters from a rarer to a denser medium at zero incidence angle, it will:
a) Travel straight
b) Reflect back
c) Bend at 45°
d) Turn to the right
Option a – Travel straight
According to the New Cartesian Sign Convention, which is correct for the lens/mirror formula 1/f = 1/v + 1/u?
a) Valid only for spherical mirrors
b) Valid only for spherical lenses
c) Valid for both spherical lenses and mirrors
d) Invalid formula
Option c – Valid for both spherical lenses and mirrors
Which statement about the behaviour of light rays is false?
a) Light travels at different speeds in different media
b) Light travels at nearly 3 × 10⁸ m/s in air
c) Light slows down when leaving water and entering air
d) Light accelerates when leaving glass and entering air
Option c – Light slows down when leaving water and entering air
Sita is 1.5 m tall and stands in front of a plane mirror. What is the minimum mirror height for her to see her full image? ( Reflection and Refraction mcq Class 10 with Answers PDF )
a) 0.25 m
b) 0.35 m
c) 0.50 m
d) 0.75 m
Option d – 0.75 m
The spherical mirror equation relating object distance (u), image distance (v), and focal length (f) can be applied to a plane mirror when: ( Reflection and Refraction mcq Class 10 with Answers PDF )
a) The focal length tends to infinity
b) The focal length tends to zero
c) The image distance tends to zero
d) The image distance tends to infinity
Option a – The focal length tends to infinity
Which phenomenon causes mountain peaks to appear reddish or orange at sunrise and sunset due to scattered light? ( Reflection and Refraction mcq Class 10 with Answers PDF )
a) Circle of confusion
b) Brillouin scattering
c) Barrel distortion
d) Alpenglow
Option d – Alpenglow
If two mirrors are placed at an angle of 120° to each other, how many images will be formed? ( Reflection and Refraction mcq Class 10 with Answers PDF )
a) 1
b) 2
c) 3
d) 4
Option b – 2
Which device, having a triangular metal frame with three legs, is used to measure the radius of curvature of curved surfaces like lenses and mirrors? ( Reflection and Refraction mcq Class 10 with Answers PDF )
a) Spherometer
b) Viscometer
c) Screw gauge
d) Vernier caliper
Option a – Spherometer
What unit is used to measure the wavelength of light? ( Reflection and Refraction mcq Class 10 with Answers PDF )
a) Angstrom
b) Candela
c) Faraday
d) Dyne
Option a – Angstrom
Which formula was experimentally confirmed by Nichols and Hull in 1903 using the radiation pressure of light? ( Reflection and Refraction mcq Class 10 with Answers PDF )
a) P = U/C
b) Pr = C/N
c) P = F/A
d) P = L/M
Option a – P = U/C
Identify an application where Solar panels are generally not used: ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) Space probes
b) Radio devices
c) Elevator systems
d) Artificial satellites
Option c – Elevator systems
If a small object is placed at the focus on the left side of a convex lens, where will the image appear? ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) At the center on the right side of the lens
b) At infinity on the right side of the lens
c) At infinity on the left side of the lens
d) At the focus on the right side of the lens
Option b – At infinity on the right side of the lens
What is the name of the effect where light bends around an opaque object making it appear smaller? ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) Reflection of light
b) Angle of refraction
c) Diffraction of light
d) Angle of incidence
Option c – Diffraction of light
Which type of radiation has very short wavelengths (<10 nm) and is produced in nuclear explosions, lightning, and radioactive decay? ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) Ultraviolet
b) Microwave
c) Infrared
d) Gamma rays
Option d – Gamma rays
What is the unit for measuring the optical power of a lens? ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) Yotta
b) Dioptre
c) Radian
d) Katal
Option b – Dioptre
Who first formulated the law of refraction, stating that each material has a definite refractive index? ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) Willebrord Snellius
b) David Brewster
c) Dennis Gabor
d) Thomas Young
Option a – Willebrord Snellius
How is the image formed by a plane mirror? ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) Virtual and erect
b) Erect and inverted
c) Laterally inverted and virtual
d) Virtual and inverted
Option a – Virtual and erect
Who invented the reflecting telescope? ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) Johannes Kepler
b) Galileo Galilei
c) Isaac Newton
d) Christiaan Huygens
Option c – Isaac Newton
Which pair of material and refractive index is incorrect? ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) Benzene – 2.42
b) Sapphire – 1.77
c) Kerosene – 1.44
d) Ruby – 1.71
Option a – Benzene – 2.42
Who developed the first process of coating one side of a glass pane with metallic silver to make a mirror? ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) C.V. Raman
b) Justus von Liebig
c) C.H. Townes
d) Victor Francis Hess
Option b – Justus von Liebig
An object is placed 10 cm in front of a lens, and the image formed is real, inverted, and same size as the object. Determine the focal length and type of lens: ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) 10 cm, diverging
b) 5 cm, converging
c) 20 cm, diverging
d) 20 cm, converging
Option b – 5 cm, converging
Which of the following is a non-luminous object? ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) Sun
b) Proxima Centauri
c) Alpha Centauri
d) Jupiter
Option d – Jupiter
Which material cannot be used to make a convex lens? ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) Glass
b) Aluminium
c) Water
d) Sapphire
Option b – Aluminium
A concave lens has a focal length of 2 m. What is its power? ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) −0.5 D
b) +0.5 D
c) −1.0 D
d) +2.0 D
Option a – −0.5 D
A non-spherical reflective spoon can be treated as a: ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) Parabolic mirror
b) Spherical mirror
c) Lens
d) Plane mirror
Option a – Parabolic mirror
When a light ray passes from a rarer to a denser medium: ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) Slows down and bends away from the normal
b) Slows down and bends towards the normal
c) Speeds up and bends away from the normal
d) Speeds up and bends towards the normal
Option b – Slows down and bends towards the normal
Where should an object be placed in front of a convex lens to get a real, magnified image? ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) At twice the focal length
b) At infinity
c) Between the principal focus and twice the focal length
d) Beyond twice the focal length
Option c – Between the principal focus and twice the focal length
The bending of light when it passes from one transparent medium to another is due to ( Reflection and Refraction MCQ Class 10 with Answers PDF )
a) Change in temperature of the medium
b) Change in amplitude of light
c) Change in speed of light
d) Internal property of light
Option c – Change in speed of light
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