Monochromatic light falls on two very narrow slits0.047 mm apart. Successive fri

Question

Monochromatic light falls on two very narrow slits0.047 mm apart. Successive fringes on a screen6.80 m away are 8.6 cm apart near the center of the pattern.

Part A

Determine the wavelength of the light.

Express your answer to two significant figures and include the appropriate units

m

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Part B

Determine the frequency of the light.

Monochromatic light falls on two very narrow slits0.047 mm apart. Successive fringes on a screen6.80 m away are 8.6 cm apart near the center of the pattern.

Part A

Determine the wavelength of the light.

Express your answer to two significant figures and include the appropriate units

m

SubmitMy AnswersGive Up

Part B

Determine the frequency of the light.

Explanation / Answer

a)

Fringe width = beta = wavelength*D/d

wavelength = beta*d/D = 8.6*10^-2*0.047*10^-3/6.8 = 594 nm

b)

Frequency = c/wavelength = 3*10^8 /594 *10^-9 = 5.05*10^13 Hz

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