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Chapter 10 - Optical Instruments - 5
1.
The lease distance for human eye is 25m.
a) False
b) True
2.
The ratio of size of the image to the size of object is called resolving power.
a) True
b) False
3.
An object placed within the focal length of a convex lens gives large image on the same side of the lens.
a) False
b) True
4.
In compound microscope the aperture of objective lens is very large compared to an eye piece lens.
a) False
b) True
5.
The magnifying power of compound microscope is given by equation M = p/q (1 + d / f
e
).
a) True
b) False
6.
An effective telescope has always objective of long focal length.
a) True
b) False
7.
Telescope is a part of spectrometer.
a) True
b) False
8.
Light can be transmitted with the help of optical fibers.
a) True
b) False
9.
Single mode step index fibre system can be used for telecommunication of telephone signals.
a) True
b) False
10.
Laser plays no role in fibre optics.
a) False
b) True
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