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Physics Class 11 - Chapter 10
Optical Instruments Test - 5
1.
Which one type of fiber is more suitable for transmission of signals in white light is used?
a) Multi mode grade step index fiber
b) Monmode step index fiber
c) Single mode step index fiber
d) Multi mode step index fiber
2.
Highly refractive part of optical fiber is?
a) Core
b) Glass
c) None of these
d) Cladding
3.
There is no noticeable boundary between core and cladding?
a) Multi mode grade index fibber
b) Single mode step index fiber
c) Multi mode step index fiber
d) monmode step index fiber
4.
The electrical signals change in to light signals for transmission through optical fibers, a light pulse represents?
a) One
b) Zero
c) Neither zero nor one
d) Zero and one
5.
Critical angle is that incident angle in denser medium for which angle of reflection is?
a) 60
b) 0
c) 90
d) 45
6.
Michelson devised the formula to calculate the speed of light?
a) C=1/16fd
b) C=20fd
c) C=4fd
d) C=16fd
7.
In optical fiber, light is used as a?
a) Transmission of light
b) Transmitter
c) All of these
d) Transmission of power
8.
A spectrometer is used to find?
a) Wavelength of different colours
b) Refractive index of the prism
c) Wavelength of light
d) All of these
9.
Light signals passes trough multimode grade index fiber due to?
a) Diffraction
b) Both of these
c) Total internal reflection
d) Continuous refraction
10.
If a convex lenses of focal length is cut into two identical halves along the lens diameter, the focal length of each diameter is?
a) F
b) 4f
c) 2f
d) f/2
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