A radiation of energy E falls normally on a perfectlyreflecting surface. The momentum transferred tothe surface is (C = Velocity of light) :-
A certain metallic surface is illuminated withmonochromatic light of wavelength, l. The stoppingpotential for photo-electric current for this light is3V0. if the same surface is illuminated with light ofwavelength 2λ, the stopping potential is V0. Thethreshold wavelength for this surface for photoelectriceffect is :-
A Carnot engine, having an efficiency of n = 1/10 asheat engine, is used as a refrigerator. If the workdone on the system is 10 J, the amount of energyabsorbed from the reservoir at lower temperature is
Which logic gate is represented by the followingcombination of logic gates ?
The refracting angle of a prism is A, and refractiveindex of the material of the prism is cot(A/2). Theangle of minimum deviation is :-
The fundamental frequency of a closed organ pipeof length 20 cm is equal to the second overtone ofan organ pipe open at both the ends. The lengthof organ pipe open at both the ends is :-