Question

What will happen if we keep a glass prism inside water instead of air and pass white light through it?

• A. White light will pass it without splitting.
• B. The angle of deviation of each splitted ray will increase.
• C. The angle deviation of each splitted ray will decrease.
• D. Splitted red light will bend more than the splitted blue light.

Answer 1

The correct option is C The angle deviation of each splitted ray will decrease.

If we keep a prism inside water instead of air, the refractive index of prism with respect to water will decrease. Thus, the angle of deviation will also decrease.