Obtain an expression for fringe width in the interference pattern of wedge shape film. How this phenomenon is used to determine thickness of thin paper.

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written 7.3 years ago by

neeta.vanage • 880

modified 3.2 years ago by

pedsangini276 • 4.8k

Subject: Applied Physics 2

Topic: Interference And Diffraction Of Light

Difficulty: Medium

engineering physics

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4.8kviews

written 7.1 years ago by

neeta.vanage • 880

modified 7.0 years ago by

yashbeer ★ 11k

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Consider a point A very near to edge of the wedge such that thickness of the film at A is $t_1$ . If $t_1$ is of such thickness that 2μ $t_1$ cos(r+ѳ) is odd multiple of λ/2 then A will look bright. All along the straight line passing through AA’ has same thickness. …

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