Wave Optics Tes...

The superposition principle in relation to displacements produced by a number of waves refers to

If we have two coherent sources S₁ and S₂ vibrating in phase with same amplitude, then for an arbitrary point P with path difference corresponding to ϕ, the resultant intensity if the intensity due to each is I0 would be

A normal eye is not able to see objects closer than 25 cm because

Interference effects of light from two sources can be observed if

If the polarising angle of a piece of glass for green light is 54.74°, the angle of minimum deviation for an equilateral prism made of same glass is

[Given : tan 54.74° = 1.414]

Two sources of light are coherent if they have

The twinkling effect of starlight is due to

Which type of phenomenon will occur when a ray of light falls on a transparent medium like water?

According to Huygens, construction relation between old and new wave fronts is-

Two waves of light are given by equations y₁ = 6 cos t and y₂ = 10 sin(t + ). The ratio of intensities at maxima and minima formed by superposition of these two waves is 

According to Huygens principle

What causes a change in the colours of soap or oil films for a given beam of light?

The amount of light entering into the eye is controlled by

In a Fresnel biprism experiment, the two positions of lens give separation between the slits as 16 cm and 9 cm. What is the actual distance of separation?

Directions: In the following question, a statement of Assertion is given, followed by a corresponding statement of Reason. Read the statements and mark your answer as

(a) if both assertion and reason are true and reason is the correct explanation of assertion
(b) if both assertion and reason are true, but reason is not the correct explanation of assertion
(c) if assertion is true, but reason is false
(d) if both assertion and reason are false

Assertion: A red object appears dark in yellow light.
Reason: Red colour is scattered less.

When a thin transparent plate of thickness t and refractive index m is placed in the path of one of the two interfering waves of light, then the path difference changes by

A diver inside water (μ = 1.33) should see the sun set at an angle of

Approximate Doppler shift formula for light is

If we have two coherent sources S₁ and S₂ vibrating in phase, then for an arbitrary point P constructive interference is observed whenever the path difference is

If we have two coherent sources S1 and S2 vibrating in phase, then for an arbitrary point P destructive interference is observed whenever the path difference is

A ray of light passes from vacuum into a medium of refractive index µ. The angle of incidence is found to be twice the angle of refraction. Then, the angle of incidence is

A blue star is 

The separation between slits is halved and between screen and slits is doubled. Find the new fringe width if the original fringe width is W.

Directions: The following question has four choices out of which ONLY ONE is correct.

In order that the light reflected from the surface of a medium of refractive index µ is plane polarized, the angle of incidence should be :

Relation between ray and wave front is