Two coherent sources of light can be obtained by

(1) Two different lamps

(2) Two different lamps but of the same power

(3) Two different lamps of the same power and having the same colour

(4) None of the above

Concept Questions :-

Huygens' principle
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

By Huygen's wave theory of light, we cannot explain the phenomenon of

(1) Interference

(2) Diffraction

(3) Photoelectric effect

(4) Polarisation

Concept Questions :-

Huygens' principle
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Two coherent monochromatic light beams of intensities I and 4I are superposed. The maximum and minimum possible intensities in the resulting beam are

(1) 5I and I

(2) 5I and 3I

(3) 9I and I

(4) 9I and 3I

Concept Questions :-

Superposition principle
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

If L is the coherence length and c the velocity of light, the coherent time is

(1) cL

(2) $\frac{L}{c}$

(3) $\frac{c}{L}$

(4) $\frac{1}{Lc}$

Concept Questions :-

Wave front
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

If the amplitude ratio of two sources producing interference is 3 : 5, the ratio of intensities at maxima and minima is

(1) 25 : 16

(2) 5 : 3

(3) 16 : 1

(4) 25 : 9

Concept Questions :-

Superposition principle
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

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

(1) $\left(2n-1\right)\frac{\lambda }{4}$

(2) $\left(2n-1\right)\frac{\lambda }{2}$

(3) $n\lambda$

(d) $\left(2n+1\right)\frac{\lambda }{2}$

Concept Questions :-

Young Double slit experiment
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Soap bubble appears coloured due to the phenomenon of

(1) Interference

(2) Diffraction

(3) Dispersion

(4) Reflection

Concept Questions :-

Interference vs Diffraction
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Which of the following statements indicates that light waves are transverse

(1) Light waves can travel in vacuum

(2) Light waves show interference

(3) Light waves can be polarized

(4) Light waves can be diffracted

Concept Questions :-

Polarization of light
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Interference was observed in interference chamber when the air was present, now the chamber is evacuated and if the same light is used, a careful observer will see

(1) No interference

(2) Interference with bright bands

(3) Interference with dark bands

(4) Interference in which width of the fringe will be slightly increased

Concept Questions :-

Superposition principle
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Ray diverging from a point source form a wave front that is

(1) Cylindrical

(2) Spherical

(3) Plane

(4) Cubical

Concept Questions :-

Wave front