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
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
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