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Free download in PDF Class 12 Physics Chapter 10 Wave Optics Multiple Choice Questions and Answers for Board, JEE, NEET, AIIMS, JIPMER, IIT-JEE, AIEE and other competitive exams. MCQ Questions for Class 12 Physics with Answers were prepared based on the latest exam pattern. These short solved questions or quizzes are provided by Gkseries. These will help the students for preparation of their examination./p>
(1)
The velocity of light in air is 3 * 108 ms-1 and that in water is 2.2 * 108 ms” . The polarising angle of incidence is
[A]
45°
[B]
50°
[C]
53.74°
[D]
63
(2)
To observe diffraction, the size of the obstacle
[A]
should beX/2, where X is the wavelength.
[B]
should be of the order of wavelength.
[C]
has no relation to wavelength.
[D]
should be much larger than the wavelength.
Answer: should be of the order of wavelength.
(3)
Two slits in Young’s double slit experiment have widths in the ratio 81 :1. The ratio of the amplitudes of light waves is
[A]
3 :1
[B]
3 : 2
[C]
9 :1
[D]
6:1
(4)
The phenomena which is not explained by Huygen’s construction of wavefront
[A]
reflection
[B]
diffraction
[C]
refraction
[D]
origin of spectra
Answer: origin of spectra
(5)
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.
Answer: The intensity decreases in proportion with the distance squared.
(6)
The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 A is of the order of
[A]
106 rad
[B]
10-2 rad
[C]
10-4 rad
[D]
10-6 rad
(7)
A laser beam is used for locating distant objects because
[A]
it is monochromatic
[B]
it is not chromatic
[C]
it is not observed
[D]
it has small angular spread.
Answer: it has small angular spread.
(8)
Light propagates rectilinearly, due to
[A]
wave nature
[B]
wavelengths
[C]
velocity
[D]
frequency
(9)
When interference of light takes place
[A]
energy is created in the region of maximum intensity
[B]
energy is destroyed in the region of maximum intensity
[C]
conservation of energy holds good and energy is redistributed
[D]
conservation of energy does not hold good
Answer: conservation of energy holds good and energy is redistributed
(10)
The refractive index of glass is 1.5 for light waves of X = 6000 A in vacuum. Its wavelength in glass is
[A]
2000 Å
[B]
4000 Å
[C]
1000 Å
[D]
3000 Å
(11)
In a double slit interference pattern, the first maxima for infrared light would be
[A]
at the same place as the first maxima for green light
[B]
closer to the centre than the first maxima for green light
[C]
farther from the centre than the first maxima for green light
[D]
infrared light does not produce an interference pattern
Answer: farther from the centre than the first maxima for green light
(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)
In a Young’s double slit experiment the distance between the slit is 1 mm and the distance of screen from the slit is 1 m. If light of wavelength 6000 A is used then the fringe width is:
[A]
0.4 mm
[B]
0.5 mm
[C]
0.6 mm
[D]
0.8 mm
(14)
In Young’s double slit experiment, the central point on the screen is:
[A]
bright
[B]
dark
[C]
first bright and later dark
[D]
first dark and later bright
(15)
In vacuum, the speed of light depends upon :
[A]
frequency
[B]
velocity
[C]
wave length
[D]
None of these
(16)
Polarization of light prove the :
[A]
corpuscular nature of light
[B]
quantum nature of light
[C]
Transverse wave nature of light
[D]
Longitudinal wave nature of light
Answer: Transverse wave nature of light
(17)
The angle of minimum deviation of a prism depends upon the aggie of:
[A]
incidence
[B]
reflection
[C]
prism
[D]
none of these
(18)
Polaroid glasses is used in sun glasses because :
[A]
It reduces the light intensity to half on account of polarization
[B]
It is fashionable
[C]
It has good colour
[D]
It is cheaper
Answer: It reduces the light intensity to half on account of polarization
(19)
The minimum value of the refractive index is:
[A]
zero
[B]
1
[C]
less than 1 but not zero
[D]
more than 1
Answer: less than 1 but not zero
(20)
C.V. Raman was awarded the Nobel prize for his work associated with which of the following phenomenon of radiations?
[A]
scattering
[B]
diffraction
[C]
interference
[D]
polarisation
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