Q 1 :    

Which of the following phenomena is not explained by wave nature of light?

(A) reflection
(B) diffraction
(C) photoelectric effect
(D) interference
(E) polarization

Choose the most appropriate answer from the options given below:   [2024]

  • E only

     

  • A, C only

     

  • B, D only

     

  • C only

     

(D)       Photoelectric effect cannot be explained by wave nature of light. Reflection, diffraction, interference, and polarization are  shown by wave nature of light.

 



Q 2 :    

Two coherent monochromatic light beams of intensities I and 4I are superimposed. The difference between maximum and minimum possible intensities in the resulting beam is xl. The value of x is ______.           [2024]



(8)      Imax-Imin=xI

           Imax=(I+4I)2=9I

           Imin=(4I-I)2=I

          9I-I=xI

          8I=xIx=8