An interference pattern was made by using red light. If the red light

⇦

⇨

An interference pattern was made by using red light. If the red light is replaced by blue light, the fringes will becomes

Options

(a) Wider
(b) Narrower
(c) Fainter
(d) Brighter

Correct Answer:

Narrower

Explanation:

Fringe width β = λD / d

β(ʀed) / β(ʙlue) = λ(ʀed) / λ(ʙlue)

λ(ʙlue) is < λ(ʀed)

Therefore, Fringe width with blue light < β with red light.

Fringes become narrower with blue light.

Related Questions:

1. On adjusting the P-N junction diode in forward bias,
2. A cyclist is riding with a spped of 27 km/h.As he approaches a circular turn
3. In a semiconductor
4. An electron in a circular orbit of radius 0.05 nm performs 10¹⁶ rev/s. The magnetic
5. In which of the following heat loss is primarily not due to convection?

Topics: Wave Optics (101)
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