A parallel beam of light of wavelength λ is incident normally on a narrow slit

⇦

⇨

A parallel beam of light of wavelength λ is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the second minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of slit is

Options

(a) πλ
(b) 2π
(c) 3π
(d) 4π

Correct Answer:

4π

Explanation:

Condition for the diffraction minima are
Path diff. ∆x = nλ and Phase diff. ?￰ﾝﾜﾙ = 2nπ
Path diff. = nλ = 2λ
Phase diff. = 2nπ = 4π (n=2)

Related Questions:

1. When a light beam of frequency v is incident on a metal surface,
2. A body starts from rest with an acceleration of 2 m/s². After 5 second,
3. Cohesive force is experienced between
4. An alpha nucleus of energy 1/2 mv² bombards a heavy nuclear target of charge Ze
5. The wavelength of light emitted from second orbit to first orbit in a hydrogen atom is

Topics: Ray Optics (94)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends