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Q. 50

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 957

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Short Answer

FIGURE P33.49 shows the interference pattern on a screen behind a diffraction grating. The wavelength of the light is . How many lines per millimeter does the grating have?

The grating hasof lines per millimetre.

See the step by step solution

Step by Step Solution

Step: 1 Derivating:

The bright fringes diffraction grating as

Step: 2 Finding the angle:

The place of bright fringes as

Step: 3 Calculating grating value:

The spacing and grating value as

The number of lines is

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