Light Class 10 MCQ. We covered all the Light Class 10 MCQ in this post for free so that you can practice well for the exam.
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MCQ on Light for Class 10 Students
The clear sky appears blue because
(a) blue light gets absorbed into the atmosphere
(b) ultraviolet radiations are absorbed in the atmosphere
(c) violet and blue lights get scattered more than lights of all other colors by the atmosphere
(d) light of all other colors is scattered more than violet and blue color lights by the atmosphere
Option c – violet and blue lights get scattered more than lights of all other colors by the atmosphere
Dispersion of light by a glass prism takes place because of
(a) the difference in wavelengths of the constituents of light
(b) the difference in speeds of various constituents of white light.
(c) scattering of light by the surface of the glass prism
(d) only b and a are correct
Option d – only b and a are correct
The danger signals installed at the top of tall buildings are red in color. These can be easily seen from a distance because among all other colors, the red light
(a) is scattered the most by smoke or fog
(b) is scattered the least by smoke or fog
(c) is absorbed the most by smoke or fog
(d) moves fastest in the air
Option b – is scattered the least by smoke or fog
Which of the following phenomena contributes? significantly to the reddish appearance of the sun at sunrise or sunset?
(a) Dispersion of light
(b) Scattering of light
(c) Total internal reflection of light
(d) Reflection of light from the earth
Option b – Scattering of light
The bluish color of water in the deep sea is due to
(a) the presence of algae and other plants found in the water
(b) the reflection of the sky in the water
(c) the scattering of light
(d) the absorption of light by the sea
Option c – the scattering of light
The distance between a spherical lens and the image is -15 cm. The lens is
(a) concave lens
(b) convex lens
(c) either of the two irrespective of the object distance
(d) either the concave lens or the convex lens with the object between O and F.
Option d – either the concave lens or the convex lens with the object between O and F
A concave mirror forms the image of an object on a screen. If the lower half of the mirror is covered with an opaque card, the effect would be to make the
(a) image less bright.
(b) the lower half of the image disappears.
(c) the upper half of the image disappears.
(d) image blurred.
Option a – image less bright
The image formed by a concave mirror is
(a) always real
(b) always virtual
(c) certainly real if the object is virtual
(d) certainly virtual if the object is real
Option c – certainly real if the object is virtual
The field of view is maximum for
(a) plane mirror
(b) concave mirror
(c) convex mirror
(d) cylindrical mirror
Option a – plane mirror
When light is refracted into a medium
(a) its wavelength and frequency both increase
(b) its wavelength increases but the frequency remain unchanged
(c) its wavelength decreases but the frequency remains unchanged
(d) its wavelength and frequency both decrease
Option b – its wavelength increases but the frequency remain unchanged
A narrow beam of white light goes through a slab having parallel faces
(a) the light never splits into different colors
(b) the emergent beam is white
(c) the light inside the slab is split into different colors
(d) the light inside the slab is white
Option b – the emergent beam is white
Which one of the following statements is correct about the magnification of an optical microscope?
(a) Magnification increases with the increase in the focal length of the eyepiece
(b) Magnification increases with the increase in the focal length of the objective
(c) Magnification does not depend upon the focal length of the eyepiece
(d) Magnification decreases with the increase in the focal length of the eyepiece
Option d – Magnification decreases with the increase in the focal length of the eyepiece
Which of the following statement is correct?
(a) A person with myopia can see distant objects clearly
(b) A person with hypermetropia can see nearby objects clearly
(c) A person with myopia can see nearby objects clearly
(d) A person with hypermetropia cannot see distant objects clearly
Option c – A person with myopia can see nearby objects clearly
A ray of light propagates from an optically denser medium to an optically rarer medium.
(a) It will bend towards the normal after refraction.
(b) It will bend away from the normal after refraction.
(c) It will continue to go on the same path after refraction.
(d) It will refract making an angle of refraction = the angle of incidence.
Option b – It will bend away from the normal after refraction
At a particular minimum value of the angle of deviation, the refracted ray becomes
(a) parallel to the base of the prism
(b) perpendicular to the base of the prism
(c) inclined at 45° w.r.t. base of the prism
(d) None of these
Option a – parallel to the base of the prism
A plane mirror reflects a beam of light to form a real image. The incident beam is
(a) parallel
(b) convergent
(c) divergent
(d) any one of the above
Option b – convergent
Rectilinear propagation of light in a medium is caused due to
(a) high frequency
(b) short wavelength
(c) velocity of light
(d) the uniform refractive index of the medium
Option d – the uniform refractive index of the medium
The color of an object is determined by
(a) the color of light reflected by it
(b) the color of light absorbed by it
(c) the color of light incident on it only
(d) None of the above
Option a – the color of light reflected by it
You are given water, mustard oil, glycerine, and kerosene. In which of these media a ray of light incident obliquely at the same angle would bend the most?
(a) Kerosene
(b) Water
(c) Mustard oil
(d) Glycerine
Option d – Glycerine
The light reflected by a plane mirror may form a real image
(a) if the rays incident on the mirror are diverging
(b) if the rays incident on the mirror are converging
(c) if the object is placed very close to the mirror
(d) under no circumstances
Option b – if the rays incident on the mirror are converging
The force-length of a plane mirror is ( Light Class 10 MCQ )
(a) zero
(b) infinite
(c) very less
(d) indefinite
Option b – infinite
A point source of light is placed in front of a plane mirror. Then
(a) all the reflected rays meet at a point when produced backward
(b) only the reflected rays close to the normal meet at a point when produced backward.
(c) only the reflected rays making a small angle with the mirror, meet at a point when produced backward.
(d) light of different colors makes different images.
Option a – all the reflected rays meet at a point when produced backward
We covered all the light class 10 MCQ above in this post for free so that you can practice well for the exam.
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