(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

1. A beam of monochromatic light undergoes minimum deviation through an equiangular prism, how does the beam pass through the prism, with respect to its base?
2. If white light is used in the same way as in part (a) above, what change do you expect in the emergent beam?
3. What conclusion do you draw about the nature of white light in part (b)?

What conclusion do you draw about the nature of white light in part (b)?

What do you understand by the term spectrum?

A ray of white light is passed through a glass prism and a spectrum is obtained on a screen.

1. Name the seven colours of the spectrum in order.
2. Do the colours have the same width in the spectrum?
3. Which of the colour of the spectrum of white light deviates (i) the most, (ii) the least?

Complete the ray diagram given below to show the nature of light produced on the screen.

When a white light ray falls on a prism, the ray at its first surface suffers ______.

In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is ______.

The frequency range of visible light is from 3.75 × 10¹⁴ Hz to 7.5 × 10¹⁴ Hz. Calculate its wavelength range. Take speed of light = 3 × 10⁸ m/s.

Define amplitude term in relation to a wave.

Define frequency term in relation to a wave.

Define wavelength term in relation to a wave.

Define wave velocity term in relation to a wave.

A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which changes.

A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which does not change.

State two factors on which the speed of a wave travelling in a medium depends.

State two differences between the light and sound waves.

What is the condition necessary for an echo to be heard distinctly?

State the use of echo by a bat, dolphin and fisherman.

How do bats avoid obstacles in their way, when in flight?

Name the waves which are used in sonar to find the depth of a sea. Give one reason for their use.