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Physics Class 11 - Chapter 9
Physical OpticsTest - 2
1.
An objects that emits its own light is called?
a) Luminous object
b) Non-luminous object
c) Incandescent object
d) None of these
2.
In double slit experiment, we observe?
a) None of these
b) Both if these
c) Interference fringes only
d) Diffraction fringes only
3.
Newton’s rings are particle study of?
a) Beats
b) Interference
c) All of these
d) Young’s double slit experiment
4.
According to Einstein, light travels from one place to another in the form of?
a) Photons
b) Not specified
c) Waves
d) Particles
5.
Which is not optically active?
a) Water
b) Tartaric acid
c) Sugar
d) Sodium chloride
6.
Light reaches the earth from sun in nearly?
a) 15 min.
b) 8 min.
c) 10 min.
d) 8 min. 30 sec.
7.
Photoelectric effect was given by?
a) Plank
b) Einstein
c) Hertz
d) Pascal
8.
When light incident normally on thin film, the path difference depends upon?
a) Angle of incident only
b) Thickness of the film only
c) All of these
d) Nature of the film
9.
Which one of the following properties of light does not change with the nature of the medium?
a) Velocity
b) Amplitude
c) Frequency
d) Wavelength
10.
Optical active crystals rotates the?
a) Vibrating plane
b) Diffraction plane
c) Polarization plane
d) Interference plane
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