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Chapter 10 - Optical Instruments - 2
1.
Television signals are changed in light signals by means of:-
a) decoder
b) photodiode
c) a transistor
d) optical fibre
2.
Cladding in optical fibre is used to:-
a) filter light
b) transmit light
c) absorb unnecessary light
d) produce total internal reflection
3.
Lens is a ................. media.
a) Focussing
b) Clean
c) Invisible
d) Transparent
4.
Magnifying ability of compound microscope can be increase by the use of ..................light.
a) Blue
b) Red
c) Green
d) Black
5.
A convex lens placed closed to eye is called .......................
a) Simple microscope
b) Simple binocular
c) Complex microscope
d) Complex binocular
6.
Michelson equation for the speed of light is ........................
a) C = 16 fd
b) C = 16 ed
c) C = 16 / fd
d) C = 16 fe
7.
Photo phone device was developed by ........................
a) Carl Marx
b) Graham Bell
c) Edison
d) Cripps
8.
Light can be propagated from one place to another through optical fibre by a process of .......................refraction and total internal reflection.
a) Continuous
b) Low
c) Oblique
d) High
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