In optic fiber transmission system _____________ are used regenerate the dim light signal? April 17, 2025 by admin A. Diodes B. Repeaters C. Laser D. Transformer
Magnification of the astronomical telescope is_____________? April 17, 2025 by admin A. fo+fe B. fo/fe C. fe/fo D. (1+fo/fe)L/fo
Errors in the transmission of power through optic fiber can be minimized by using a______________? April 17, 2025 by admin A. Multimode index fiber B. Graded index fiber C. Single mode step index fiber D. Copper wire
The function of collimeter in spectrometer is________________? April 17, 2025 by admin A. to produce parallel beams of light B. to filter the light rays C. to make them D. no function
In optic fiber transmission the repeater are separated through a distance of __________ km in newer system? April 17, 2025 by admin A. 300km B. 200km C. 100km D. 20km
Michelson devised the formula to calculate the speed of light_______________? April 17, 2025 by admin A. C = 4fd B. C = 8fd C. C = 16fd D. C = 5/2fd
A convex lens acts as a diverging lens if the_________________? April 17, 2025 by admin 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
The equation θ = 1.22 λ/D was devised by_______________? April 17, 2025 by admin A. Newton B. Einstein C. Raleigh D. Planks
Michelson calculated the speed of light using the instruments______________? April 17, 2025 by admin A. spectrometer B. galvanometer C. interferometer D. none of these
Ratio of the weight of H-atom to that of an electron is approximately______________? April 17, 2025 by admin A. 18.336 B. 1836 C. 18360 D. 183.6
