Question

Ifa is width of each slit, b is width of each opaque space and W is the width of a diffraction grating, the number of lines per unit length is
A 1a+b
B. Wa+b
C. W(a+b)
D. a+b​

Answer 1

Answer:

c) W (a+b)

Explanation:

This is ur answer

Answer 2

The correct answer is option (C.) W(a+b)

Explanation:

• Ifa is width of each slit, b is width of each opaque space and W is the width of a diffraction grating, the number of lines per unit length is W(a+b).
• An arrangement consisting of large number of parallel slits of the same width and separated by equal opaque spaces is known as diffraction grating.
• Diffraction refers to various phenomena that occur when a wave encounters an obstacle or opening.
• It is defined as the bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/aperture.