The existence of Ether wind was experimentally rejected by__________________?
(A) equal to its rest mass
(B) double of its rest mass
(C) infinite
(D) zero
Stopping potential for a metal surface in case of photoelectric emission depends on_____________?
(A) the threshold frequency for the metal surface
(B) the intensity of incident light
(C) the frequency of incident light and work function of the metal surface
(D) all of the above
The linear momentum of an X-ray photon of wavelength 0.1A is_______________?
(A) 6.625x1023N-s
(B) 66.25x1023N-s
(C) 662.5x1023N-s
(D) data is insufficient
An observer shoots parallel to a meter stick at very high (relativistic) speed and finds that the length of meter stick is________________?
(A) greater than one meter
(B) less than one meter
(C) one meter
(D) a foolish question
Mark the wrong statement ?
(A) a frame of reference which is either at rest or moves with a constant velocity is called an inertial frame of reference
(B) an un-accelerated frame of reference is called an inertial frame of reference
(C) all the frames of reference in uniform rectilinear motion are equivalent
(D) Newtons laws of motion are valid in an accelerated (non inertial) frame of reference
0.001 kg mass will be equivalent to_________________?
(A) 2.50 GWh
(B) 25.00 GWh
(C) 0.26 GWh
(D) 250 GWh
Which one of the following radiations has the strongest photon?
(A) T.V waves
(B) Microwaves
(C) X-rays
(D) γ-rays
After traveling through a vacuum a photon of light entering into some transparent denser medium. Thus the energy of light______________?
(A) Increases because wavelength decreases
(B) Decreases because speed decreases
(C) Remains same
(D) Increases then decrease
Which one of the following has the largest energy content ?
(A) 103 photons of wavelength 2 pm (γ-rays)
(B) 102 photons of wavelength 1nm (x-rays)
(C) 106 photons of wavelength 50?m (infrared)
(D) 106 photons of wavelength 200nm (UV)