- (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
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- (A) 6.625x1023N-s
- (B) 66.25x1023N-s
- (C) 662.5x1023N-s
- (D) data is insufficient
- (A) zero
- (B) hv/c2
- (C) hv/c
- (D) c2/hv
- (A) greater than one meter
- (B) less than one meter
- (C) one meter
- (D) a foolish question
- (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
- (A) 2.50 GWh
- (B) 25.00 GWh
- (C) 0.26 GWh
- (D) 250 GWh
- (A) T.V waves
- (B) Microwaves
- (C) X-rays
- (D) γ-rays
- (A) Increases because wavelength decreases
- (B) Decreases because speed decreases
- (C) Remains same
- (D) Increases then decrease
- (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)
- (A) A unit of energy
- (B) A positively charged particle
- (C) A quantum of electromagnetic radiation
- (D) A unit of wavelength
