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# Finding Wavelength of Light Through Diffraction

APPH12-LQKWN5

A laser is directed at a narrow slit of width, $d=0.1\text{ mm}$. You observe a diffraction pattern $5\text{ m}$ from the light with an average distance between peaks of, $B=2\text{ cm}$. What was the wavelength of the light?

A

$400\text{ nm}$

B

$0.04\text{ nm}$

C

$2.5\cdot { 10 }^{ 7 }\text{ nm}$

D

$4\cdot { 10 }^{ 10 }\text{ nm}$