Question

(a ) What is meant by a coherent light source?

(b) Describe how you would determine the wavelength of monochromatic light using Young's

double slit. Your account should include a diagram, observations, precautions, and how you use the

observations to reach conclusions.

Answer 1

Answer

a) according to concepts of physics Two sources are said to be coherent when the waves emitted from them have the same frequency and constant phase difference.

b) diagram is given

$sin\theta=\frac{m\lambda}{d}\\$

Where we can find wavelegth.

Now precautions are below

A) light shoud be monochromatic.

B) Safety Precaution

C) Young's Wave Theory of Light

D) Purpose of Experiment should clear