Physics Important Questions Class 12 UP Board. We covered all the Physics Important Questions Class 12 UP Board in this post for free so that you can practice well for the exam.
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Physics Important MCQs Class 12 UP Board for Students
A ray of light refracts from a denser medium to a rarer medium by some angle. After refraction it :
(A) bends towards the normal
(B) goes away from the normal
(C) goes in straight without any deviation
(D) depends on the denser medium
Option b – goes away from the normal
In a medium, different colors of light travel with :
(A) the same speed
(B) different speeds
(C) continuously decreasing speeds
(D) continuously Increasing speeds
Option b – different speeds
At noon, the overhead sun is of normal size. It is due to :
(A) reflection of light through the atmosphere
(B) the normal incidence of light through the atmosphere for which the angle of refraction is zero
(C) polarization of light
(D) diffraction of light
Option b – the normal incidence of light through the atmosphere for which the angle of refraction is zero
When light travels from rarer to denser medium the width of the wavefront :
(A) decreases
(B) increases
(C) remains constant
(D) both (A) and (B)
Option b – increases
The ratio of the refractive index for the orange light to green light in air is :
(A) < 1
(B) > 1
(C) 1
(D) ∞
Option a –
The ratio of the refractive index for the orange light to Greenlight in glass is :
(A) < 1
(B) > 1
(C) 1
(D) ∞
Option a –
The refractive index of a given piece of transparent quartz is the greatest for :
(A) green light
(B) yellow light
(C) red light
(D) violet light
Option d – violet light
Even in absolutely clear water, a car driver cannot see very clearly. This is so because
(A) rays of light are scattered in the water
(B) the focal length of the eye lens in water gets changed
(C) the speed of light is reduced in water so the path of the ray of light changes
(D) all of these
Option c – the speed of light is reduced in water so the path of the ray of light changes
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Also, check out:
- Previous Year Question Paper of Class 12 Bihar Board Physics
- Physics Chapter wise Weightage Class 12 HSC
- GRB Physics Class 12
