Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Wave Optics

Question:

The figure shows a double slit experiment P and Q are the slits. The path lengths PX and QX are nλ and (n + 2)λ respectively, where n is a whole number and λ is the wavelength. Taking the central fringe as zero, what is formed at X

Options:

First bright

First dark

Second bright

Second dark

Correct Answer:

Second bright

Explanation:

For brightness, path difference nλ = 2λ

So second is bright.