Interference Of light 2

  The Phenomenon of interference is shown by

• Longitudinal mechanical waves only       

• Transverse  mechanical waves only

• Electromagnetic waves only                    

• All the above types of waves

By a monochromatic wave, we mean

• A single ray                                     

• A single ray of a single colour    

• Wave having a single wavelength     

• Many rays of a single colour

   Wave nature of light follows  because

• Light rays travel in a straight line

• Light exhibits the phenomenon of reflection and refraction

• Light exhibits the phenomenon of interference     

• Light causes the phenomenon of photoelectric effect

    Colours of thin films result from

• Dispersion of light           

• Interference of light         

• Absorption of light  

• Scattering of light

   For constructive interference to take place between two monochromatic light waves of wavelength λ   the path difference should be

• (2n -1 ) λ /4            

• (2n-1 ) λ /2           

• n λ            

• (2n +1) λ/2

   Two sources of waves are called coherent if

• Both have the same amplitude of vibrations   

• Both produce waves of the same wavelength    

• Both Produce waves of the same wavelength having constant phase difference   

• Both Produce waves having the same velocity

    Soap bubble appears coloured due to the phenomenon of

• Interference  

• Diffraction

• Dispersion          

• Reflection

   Evidence for the wave nature of light cannot be obtained from

• Reflection

• Doppler effect            

• Interference

• Diffraction

    Which of the following is conserved when light waves interfere

• Intensity 

• Energy                    

• Amplitude       

• Momentum

    Intensity of lights depends upon

• Velocity     

• Wavelength  

• Amplitude

• Frequency