A. Balmer series
B. Pfund series
C. Bracket series
D. Lymann series
In hydrogen spectrum which one of the following series lies in the ultraviolet region ? Read More »
Atomic Spectra, Physics Mcqs A. 18.336
B. 1836
C. 18360
D. 183.6
Ratio of the weight of H-atom to that of an electron is approximately______________? Read More »
Atomic Spectra, Physics Mcqs A. spectrometer
B. galvanometer
C. interferometer
D. none of these
Michelson calculated the speed of light using the instruments______________? Read More »
Optical Instruments, Physics Mcqs A. Newton
B. Einstein
C. Raleigh
D. Planks
The equation θ = 1.22 λ/D was devised by_______________? Read More »
Optical Instruments, Physics Mcqs 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
A convex lens acts as a diverging lens if the_________________? Read More »
Optical Instruments, Physics Mcqs A. C = 4fd
B. C = 8fd
C. C = 16fd
D. C = 5/2fd
Michelson devised the formula to calculate the speed of light_______________? Read More »
Optical Instruments, Physics Mcqs A. 300km
B. 200km
C. 100km
D. 20km
A. to produce parallel beams of light
B. to filter the light rays
C. to make them
D. no function
The function of collimeter in spectrometer is________________? Read More »
Optical Instruments, Physics Mcqs A. Multimode index fiber
B. Graded index fiber
C. Single mode step index fiber
D. Copper wire
A. fo+fe
B. fo/fe
C. fe/fo
D. (1+fo/fe)L/fo
Magnification of the astronomical telescope is_____________? Read More »
Optical Instruments, Physics Mcqs