Page 2 - Wave Optics Work Sheet -1

11. According to Huygens’ principle, light is a form of
(a) particle

(b) rays
(c) wave
(d) radiation
12. The idea of secondary wavelets for the. propagation of a wave was first
given by

(a) Newton
(b) Huygens
(c) Maxwell

(d) Fresnel
13. Light propagates rectilinearly, due to
(a) wave nature
(b) wavelengths
(c) velocity

(d) frequency
14. Which of the following is correct for light diverging from a point source?
(a) The intensity decreases in proportion with the distance squared.
(b) The wavefront is parabolic.
(c) The intensity at the wavelength does not depend on the distance.

(d) None of these.
15. The phenomena which is not explained by Huygen’s construction of
wavefront
(a) reflection

(b) diffraction
(c) refraction

(d) origin of spectra
16. For light diverging from a point source

(a) the wavefront is spherical.
(b) the intensity increases in proportion to the distance squared.
(c) the wavefront is parabolic.
(d) the intensity at the wavefront does not depend on the distance.