Interference of Light

The essential condition to obtain sustain interference pattern is that the superimposing waves should  possess

• Same frequency

• Coherent

• Same or nearly amplitude

• All of the above

Which phenomenon is observed in the above figure?

• Wedge-Shaped film

• Destructive Interference

• Newton's Ring

• Refraction

Constructive interference happens when two waves are

• out of phase

• Zero Amplitude

• In phase

• In front

When a Ray of light gets reflected from the surface of a denser medium then, additional path difference introduced is

• λ/2

• λ/4

• λ/8

• λ

9. Two waves have amplitude in the ratio 5:3. The ratio of maximum to the minimum intensity is

• 3:5

• 5:3

• 16:1

• 1:49

The two waves interfere destructively if path difference between them is equal to

• nλ

• Zero

• (2n+1) λ/2

• (2n+1) λ

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            

• (2n +1 ) λ /4            

• n λ   

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

When 2 waves meet and create a bigger wave

• Constructive Interference

• Destructive Interference