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Fundamentals Of Physics
Found in: Page 1080

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Short Answer

Find the slit separation of a double-slit arrangement that will produce interference fringes 0.018radapart on a distant screen when the light has wavelength λ=589nm.

Thus, the wavelength of visible light is33μm.

See the step by step solution

Step by Step Solution

Step 1: According to the question.

In the case of a distant screen the angle θ is close to zero so sinθθ

Thus, solve further gives:


Here, λ is wavelength of light in air/vacuum.

Step 2: The wavelength of visible light. 

Use the above formula as follows:


Hence, the wavelength of visible light is33μm.

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