(a) 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?

(b) If white light is used in the same way as in part (a) above, what change do you expect in the emergent beam?

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

Calculate the frequency of yellow light of wavelength 550 nm. The speed of light is 3 x 10⁸ m s^-1.

When an electromagnetic wave passes from one medium to the other, which property remains unchanged ?

1. speed
2. wavelength
3. direction of travel
4. frequency

Two waves A and B have wavelengths 0.01 Å and 9000 Å respectively. The waves A and B are:

1. Gamma wave and ultraviolet wave respectively.
2. Microwave and infrared wave respectively.
3. Radiowave and gamma wave respectively.
4. Gamma wave and infrared wave respectively.