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.Management Sciences
Category: Optical Instruments
In optic fiber transmission the repeater are separated through a distance of __________ km in newer system?
0
A. 300km
B. 200km
C. 100km
D. 20km
Errors in the transmission of power through optic fiber can be minimized by using a______________?
A. Multimode index fiber
B. Graded index fiber
C. Single mode step index fiber
D. Copper wire
The function of collimeter in spectrometer is________________?
A. to produce parallel beams of light
B. to filter the light rays
C. to make them
D. no function
Magnification of the astronomical telescope is_____________?
A. fo+fe
B. fo/fe
C. fe/fo
D. (1+fo/fe)L/fo
A convex lens gives a virtual image only when the objects lies_________________?
A. between principal focus and center of curvature
B. beyond 2 f
C. at the principal focus
D. between principal focus and optical center
For normal adjustment, length of astronomical telescope is______________?
A. fo + fe
B. fo – fe
C. fo / fe
D. fe / fo
A point where the incident parallel rays of light converge or appear to diverge after passing through a lens is called______________?
A. center of curvature
B. focus
C. optical center
D. aperture
In optic fiber transmission system _____________ are used regenerate the dim light signal?
A. Diodes
B. Repeaters
C. Laser
D. Transformer
A convex lens acts as a diverging lens if the_________________?
A. object is beyond C
B. if the object is with in C
C. if the object is within f
D. both B and C
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