H2P-627

Measuring wavelength with a grating

H2 Physics · JC 2 · Medium · Measuring wavelength with a grating

A beam of monochromatic light of wavelength

520\text{ nm}

passes through two slits separated by

0.40\text{ mm}

and forms an interference pattern on a screen

1.6\text{ m}

away. Using the double-slit formula

x = \lambda D / a

, calculate the separation between adjacent bright fringes on the screen.

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