Page 2 - Wave Optics Work Sheet -2

(b) conservation of energy.
(c) conservation of momentum and energy.

(d) quantum nature of light.
7. A double slit interference experiment is carried out in air and the entire
arrangement is dipped in water. The fringe width
(a) increases
(b) decreases

(c) remains unchanged.
(d) fringe pattern disappears.
8. In Young’s double slit experiment, if the monochromatic source of
yellow light is replaced by red light, the fringe width

(a) increases
(b) decreases.
(c) remains unchanged.

(d) the fringes disappear
9. In Young’s double-slit experiment, the intensity at the central maximum

is I 0 if one of the slit is covered, then the intensity at the central
maximum become:

10. Superposition of two waves in the same phase ‘ to produce maximum

intensity is known as _______ interference.
11. For a destructive interference, phase difference between wave is

_______ .
12. Path difference between two waves, having wavelength X and

undergoing constructive interference is _______ .
13. Why are coherent sources required to create interference of light?
14. State the reason, why two independent sources of light cannot be
considered as coherent sources.
15. What is the ratio of the fringe width for bright and dark fringes in

Young’s double slit experiment? [HOTS]