Light MCQ question and answer with solution | Physics Gk MCQs

Which of the following options represents the correct ascending order of the refractive index of certain substances? (Left to right)

A rose appears red because

What is the center of curvature of a spherical mirror?

A concave lens always forms an image which is

The reflector of a search light is a

When white light, which is a mixture of seven colours, passes through a prism, why is it dispersed?

Consider the following statements.
1. Fibre optics is based on the principle of total internal reflection.
2. In an optical fibre communication system, power consumption is extremely low
3. Optical fibre communications are free from radio frequency interference.
4. In India, Reliance Group of Industries is engaged in the manufacture of the optical fibre.
Which of these statements are correct?

If the lens power of glass is +2 dioptre, its focal length will be

When an object is on the . . . . . . . . of a convex lens, the image is amplified, virtual, and erect.

Rainbow formation is due to