MCQs of Waves Optics

Waves Optics MCQs

MCQs of Waves Optics

Showing 111 to 120 out of 131 Questions

111.

In Young's experiment, maximum intensity in the interference fringe is 5 and minimum intensity in the interference fringe is 3, then visibility of fringe is _____

(a)	0.50
(b)	0.75
(c)	1.0
(d)	0.25

112.

Wave optics is valid, when the characteristic dimensions are _____

(a)	of the order of one lines
(b)	of the same order as wave length of light
(c)	much larger than the wavelength of light
(d)	much smaller than the wavelength of light

113.

Huygen's wave theory of light cannot explain _____

(a)	diffraction
(b)	interference
(c)	polarization
(d)	photoelectric effect

114.

Huygen's wave theory allows us to know _____

(a)	velocity of wave
(b)	amplitude of wave
(c)	wavelength of wave
(d)	propagation of wave front

115.

Which nature of the wavefront is associated with a parallel beam of light ?

(a)	spherical
(b)	cylindrical
(c)	plane
(d)	none of above

116.

The device which produces highly Coherent sources is _____

(a)	Fresnel biprism
(b)	Young's double slit
(c)	Laser
(d)	Lloyd's mirror

117.

We shift Young's double slit experiment from air to clean water, it can be predicted that the fringe pattern will _____

(a)	remain uncharged
(b)	equal intensity
(c)	be enlarged
(d)	Shrink

118.

For the sustained interference of light, the necessary condition is that the two sources should _____

(a)	be narrower
(b)	be close to each other
(c)	have constant phase difference
(d)	have same amplitude

119.

The condition for observing Fraunhoffer diffraction from a single slit is that light wave from incident on the slit should be ______

(a)	spherical
(b)	cylinderical
(c)	elliptical
(d)	plane

120.

Diffraction pattern is obtained using red light. What will happen if it is replaced by violet light ?

(a)	Bands will disappear
(b)	Bands will get separated apart
(c)	Bands will remain unchanged
(d)	Bands will become narrow

Showing 111 to 120 out of 131 Questions