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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
When a Light ray passes from a denser medium into a rarer medium, after refraction it
a) bends towards the normal
b) bends away from the normal
c) continues straight without deviation
d) depends on the nature of the denser medium
Option b – bends away from the normal
In a given medium, different colours of Light propagate with
a) identical speeds
b) different speeds
c) steadily decreasing speeds
d) steadily increasing speeds
Option b – different speeds
The Sun appears of its actual size when observed at noon mainly due to
a) reflection of Light by the Atmosphere
b) normal incidence of sunlight through the Atmosphere, resulting in zero refraction angle
c) polarization of Light
d) Diffraction of Light
Option b – normal incidence of sunlight through the Atmosphere, resulting in zero refraction angle
When Light travels from a rarer medium into a denser medium, the width of the wavefront
a) decreases
b) increases
c) remains unchanged
d) may either increase or decrease
Option b – increases
The ratio of the refractive index of orange Light to that of green Light in air is
a) less than 1
b) greater than 1
c) equal to 1
d) infinite
Option a – less than 1
The ratio of the refractive index of orange Light to that of green Light in glass is
a) less than 1
b) greater than 1
c) equal to 1
d) infinite
Option a – less than 1
For a transparent quartz crystal, the refractive index is maximum for
a) green light
b) yellow light
c) red light
d) violet light
Option d – violet light
Even in perfectly clear water, objects ahead are not seen sharply by a car driver mainly because
a) light rays undergo scattering in water
b) the focal length of the eye lens changes in water
c) the reduced speed of light in water alters the ray path
d) all of the above
Option c – the reduced speed of light in water alters the ray path
We covered all the Physics important Questions Class 12 UP Board above in this post for free so that you can practice well for the exam.
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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
