In hydrogen spectrum which one of the following series lies in the ultraviolet region ?
A. Balmer series
B. Pfund series
C. Bracket series
D. Lymann series
Physics Mcqs
Ratio of the weight of H-atom to that of an electron is approximately______________?
Ratio of the weight of H-atom to that of an electron is approximately______________?
A. 18.336
B. 1836
C. 18360
D. 183.6
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
B. Graded 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