## Michelson calculated the speed of light using the instruments______________?

Michelson calculated the speed of light using the instruments______________?

A. spectrometer
B. galvanometer
C. interferometer
D. none of these

## The equation θ = 1.22 λ/D was devised by_______________?

The equation θ = 1.22 λ/D was devised by_______________?

A. Newton
B. Einstein
C. Raleigh
D. Planks

## A convex lens acts as a diverging lens if the_________________?

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

## Michelson devised the formula to calculate the speed of light_______________?

Michelson devised the formula to calculate the speed of light_______________?

A. C = 4fd
B. C = 8fd
C. C = 16fd
D. C = 5/2fd

## In optic fiber transmission the repeater are separated through a distance of __________ km in newer system?

In optic fiber transmission the repeater are separated through a distance of __________ km in newer system?

A. 300km
B. 200km
C. 100km
D. 20km

## The function of collimeter in spectrometer is________________?

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

## Errors in the transmission of power through optic fiber can be minimized by using a______________?

Errors in the transmission of power through optic fiber can be minimized by using a______________?

A. Multimode index fiber
C. Single mode step index fiber
D. Copper wire

## Magnification of the astronomical telescope is_____________?

Magnification of the astronomical telescope is_____________?

A. fo+fe
B. fo/fe
C. fe/fo
D. (1+fo/fe)L/fo

## In optic fiber transmission system _____________ are used regenerate the dim light signal?

In optic fiber transmission system _____________ are used regenerate the dim light signal?

A. Diodes
B. Repeaters
C. Laser
D. Transformer

## The value of critical angle for glass is_______________?

The value of critical angle for glass is_______________?

A. 42°
B. 47°
C. 52°
D. 50°