Light Reflection and Refraction MCQ. We covered all the Light Reflection and Refraction MCQ in this post for free so that you can practice well for the exam.
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MCQ on Light Reflection and Refraction for Students
The sun is seen before the actual sunrise because of ……
(a) reflection
(b) refraction
(c) scattering of light
(d) rectilinear propagation of light
Option a – reflection
A plane mirror is approaching you at a speed of 10 cm/s you can see your image in it. At what speed will your image approach you?
(a) 10 cm/s
(b) 5 cm/s
(c) 20 cm/s
(d) 15 cm/s
Option c – 20 cm/s
Consider the following statements and select the correct code. Assertion (A): Small glass beads fixed on traffic signals glow brightly when light falls upon them. Reason (R): Light is totally reflected when the angle of incidence exceeds a certain critical value and light traveling in a denser medium is reflected from a rarer medium. Codes :
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and Rare are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Option a – Both A and R are true and R is the correct explanation of A
Which of the following has the highest frequency?
(a) Cosmic rays
(b) X-rays
(c) Radio waves
(d) Microwaves
Option a – Cosmic rays
Which of the following electromagnetic wave has the longest wavelength?
(a) Infrared rays
(b) Gamma rays
(c) Light rays
(d) Ultra-violet rays
Option a – Infrared rays
Consider the following statements and select the correct code. Assertion (A): A diamond sparkles more than a glass imitation cut to the same shape. Reason (R): The refractive index of diamonds is less than that of glass. Codes :
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Option c – A is true, but R is false
Consider the following statements and select the correct code. Assertion (A): A stick is dipped in water in a slanting position. If observed sideways, the stick appears short and bent at the surface of the water. Reason (R): The light coming from the stick undergoes scattering from water molecules giving the stick a short and bent appearance. Codes :
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Option c – A is true, but R is false
When a wave is intercepted by an article, the rays bend around the obstacle particle. The phenomenon is known as
(a) Interference
(b) Diffraction
(c) Polarisation
(d) Total internal reflection
Option a – Interference
Which of the following colours of white light is least deviated by the prism?
(a) Green
(b) Violet
(c) Indigo
(d) Yellow
Option d – Yellow
Which one of the following statements is correct? The velocity of sound :
(a) Does not depend upon the nature of media
(b) is maximum in gases and minimum in liquids
(c) is maximum in solids and minimum in liquids
(d) is maximum in solids and minimum in gases
Option d – is maximum in solids and minimum in gases
The objective in a reflecting telescope is
(a) Concave mirror
(b) Convex mirror
(c) Prism
(d) Concavo-Convex lens
Option a – Concave mirror
Both light and sound have wave character, yet diffraction is much harder to observe in light, because
(a) Light can travel in vacuum
(b) Light waves are transverse
(c) Speed of light is very high
(d) Wave length of light is rather small
The power of a lens is measured in
(a) dioptre
(b) aeon
(c) lumen
(d) candela
Option a – dioptre
The reason of mirage is
(a) interference of light
(b) diffraction of light
(c) polarisation of light
(d) total internal reflection of light
Option d – total internal reflection of light
The colour of light is determined by its
(a) amplitude
(b) wavelength
(c) intensity
(d) velocity
Option a – amplitude
The mirror used by a dentist to examine the teeth of patients is
(a) Concave
(b) Convex
(c) Plane
(d) Cylindrical
Option a – Concave
To look total image of a person, the minimum height of a plane mirror is
(a) Equal to the height of a person.
(b) Half of the height of a person.
(c) One fourth of the height of a person.
(d) Two times the height of a person.
Option a – Equal to the height of a person
Which one of the following types of mirror is used to see the traffic behind the car?
(a) Convex mirror
(b) Concave mirror
(c) Plane mirror
(d) Spherical mirror
Option a – Convex mirror
How many images will be formed if a point light source is placed between two parallel plane mirrors?
(a) Two
(b) Four
(c) Eight
(d) Infinite
Option d – Infinite
The critical angle for light passing from glass into air is minimum for
(a) Red light
(b) Yellow light
(c) Green light
(d) Violet light
Option d – Violet light
When the length of the tube of a microscope is increased, its magnifying power
(a) Decreases
(b) Increases
(c) Remains constant
(d) None of the above
Option b – Increases
Consider the following parts of spectra : 1. Visible 2. Infrared 3. Ultraviolet 4. Microwave Which of the following is the correct sequence in which the wavelengths increase?
(a) 4,3,1,2
(b) 4,1,2,3
(c) 3,2,1,4
(d) 3,1,2,4
Option d – 3,1,2,4
Which one of the following statements is NOT true for a person suffering from hypermetropia?
(a) The person can see far objects distinctly
(b) The focal length of the lens is large.
(c) The image of the close objects is focussed behind the retina.
(d) A concave lens is used to correct this defeat.
Option d – A concave lens is used to correct this defeat
What type of electromagnetic radiation is used in the remote control of a television?
(a) Infrared
(b) Ultraviolet
(c) Visible
(d) None of these
Option a – Infrared
Which mirror is used as a rear view mirror in the vehicles?
(a) Plane
(b) Convex
(c) Concave
(d) Inverted
Option b – Convex
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