Wave Optics

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In Young's Double Slit Experiment, what is the nature of the light that falls on the two narrow slits S1 and S2?

Polychromatic light (multiple wavelengths)
Monochromatic light (single wavelength) (correct)
Laser light
White light

What is the result of the superposition of waves from two coherent sources in Young's Double Slit Experiment?

Destructive interference only
No interference pattern
An interference pattern with maxima and minima (correct)
Constructive interference only

What happens to the energy in the process of interference in Young's Double Slit Experiment?

Energy is destroyed
Energy is redistributed in the form of maxima and minima (correct)
Energy is created
Energy remains constant

What is the ratio of the resultant intensity at point P and point Q if two waves having equal intensity meet at these points with path differences Δ1 and Δ2 respectively?

cos²(πΔ1/λ) / cos²(πΔ2/λ) (B) Signup and view all the answers

What is the condition for constructive interference in Young's Double Slit Experiment?

Path difference is an integer multiple of λ (B) Signup and view all the answers

What is the condition for maximum fringe visibility in an interference pattern?

Imin = 0 (B) Signup and view all the answers

In Young's Double Slit Experiment, what is the path difference between the waves reaching at point P?

D(1 + d2/D2) (A) Signup and view all the answers

What is the condition for a dark fringe at point P in Young's Double Slit Experiment?

Δ = (2n - 1)λ/2 (A) Signup and view all the answers

What is the characteristic of a thin film that exhibits interference effects?

Its thickness is comparable to the wavelength of incident light (C) Signup and view all the answers

What is the relationship between the shift of zero-order maxima and the shift of nth order maxima?

They are independent of wavelength (B) Signup and view all the answers

What is the characteristic of the central fringe in a Young's Double Slit Experiment?

It is always bright (A) Signup and view all the answers

What happens to the fringe pattern when the slit widths are unequal?

The minima will not be complete dark (B) Signup and view all the answers

What is the condition for maxima to occur at a point P on the screen?

Δ = nλ (D) Signup and view all the answers

What happens when the two slits are illuminated with different colors of light?

No interference pattern is observed on the screen (B) Signup and view all the answers

What is the path difference between the interfering waves meeting at a point P on the screen?

xd = d sinθ (C) Signup and view all the answers

When do the waves meet a point with maximum light?

When the waves meet a point with same phase (D) Signup and view all the answers

What is the condition for destructive interference?

Phase difference between the waves at the point of observation is 180 degrees or (2n-1)π (B) Signup and view all the answers

What is the resultant amplitude at the point of observation when the waves meet with same phase?

I1 + I2 + 2√I1I2 (A) Signup and view all the answers

What is the condition for minimum intensity at the point of observation?

Path difference between the waves at the point of observation is (2n-1)λ/2 (B) Signup and view all the answers

What is the relation between the maximum intensity and the intensity of individual waves?

I_max = 2I0 (C) Signup and view all the answers

What is the minimum thickness of the film required for visible interference?

10000 Å (C) Signup and view all the answers

What is the condition for constructive interference in reflected light in a thin film?

Δ = (2n ± 1) λ/2 (A) Signup and view all the answers

What is the purpose of the plane glass plate in Lloyd's Mirror?

To act as a mirror (D) Signup and view all the answers

What is the nature of the sources formed in Lloyd's Mirror?

Coherent sources (A) Signup and view all the answers

What is the direction of incidence of light on the plane glass plate in Lloyd's Mirror?

Grazing incidence (B) Signup and view all the answers

What is the primary reason for the condition of monochromatic light in Young's Double Slit Experiment?

To eliminate overlapping of patterns (A) Signup and view all the answers

What is the effect of placing a thin film of mica or glass in the path of one of the waves?

The fringe pattern shifts upward or downward (A) Signup and view all the answers

What is the condition for observing sustained interference in Young's Double Slit Experiment?

The initial phase difference between the interfering waves must remain constant (A) Signup and view all the answers

What is the significance of the condition that the sources must be close to each other in Young's Double Slit Experiment?

To ensure that the eye can resolve fringes (C) Signup and view all the answers

What is the relationship between the shift of fringe pattern and the order of fringe?

The shift is independent of the order of fringe (B) Signup and view all the answers