A. Hertz
B. Fresnel
C. Einstein
D. Plank
Related Mcqs:
- In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________?
A. Becomes double
B. Remains same
C. Becomes half
D. First increases then decrease because of the curvilinear graph - Reverse process of photoelectric effect is_______________?
A. pair production
B. Compton effect
C. annihilation of matter
D. X-rays production - Einstein’s photoelectric equation is given by_______________?
A. 1/2 mvmax2=hf+Φ
B. 1/2 mvmax2-hf = Φ
C. 1/2 mvmax2=hf-Φ
D. All of above are correct - 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 - Diffraction effect is____________________?
A. more for a round edge
B. less for a round edge
C. more for a sharp edge
D. less for a sharp edge - appearance of colour in thin films is due to ____________________?
A. diffraction
B. dispersion
C. interference
D. polarization - A diffraction grating has 500 lines per mm. Its slit spacing or grating element will be equal to ____________________?
A. 500 mm
B. 5 x 10-3 mm
C. 2 x 10-5 mm
D. 2 x 10-3 mm - Doppler effect applies to____________________?
A. sound wave only
B. light wave only
C. both sound and light waves
D. neither sound nor light wave - The effect of the decrease in pressure with the increase of the speed of the fluid in a horizontal pipe is known as______________?
A. Bernoulli effect
B. Torricelli effect
C. Venturi effect
D. Stokes effect - The turning effect of force is called_________?
A. Moment
B. Momentum
C. Torque
D. None of theseSubmitted by: Malik Asghar Hussain
