Ray Optics-Reflection and Refraction of Light (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 1 - 2 of 2

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Question number: 1

» Ray Optics » Reflection and Refraction of Light

Appeared in Year: 2014

MCQ▾

Question

Monochromatic light passes through a prism. Compared to that in air, inside the prism the light’s

Choices

Choice (4) Response

a.

wavelength and frequency are different, but speed remains same.

b.

speed and wavelength are different but frequency remains same.

c.

speed, wavelength and frequency are all different.

d.

speed and frequency are different but wavelength remains same.

Question number: 2

» Ray Optics » Reflection and Refraction of Light » Spherical Surface

Appeared in Year: 2014

MCQ▾

Question

A concave mirror of radius of curvature R has a circular outline of radius r. A circular disc is to be placed normal to the axis at the focus so that it collects all the light that is reflected from the mirror from a beam parallel to the axis. For r < < R, the area of this disc has to be at least,

Choices

Choice (4) Response

a.

πr44R2

b.

πr54R3

c.

πr4R2

d.

πr64R4

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