4. (a)(i) A sodium light of wavelength 580 nm falls on two narrow slits. The distancebetween the third dark fringe to the central bright on a screen is 3.5 mm. Distancebetween slits and screen is 160 cm. What is the spacing between the two slits?(ii) Solar cells are an example of anti-reflective coatings. Let a silicon solar cell (n= 3.45) coated with a layer of silicon dioxide (n = 1.45). Calculate the minimumcoating thickness that will minimize the reflection of the light with wavelengthof 650 nm?

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4. (a) (i) A sodium light of wavelength 580 nm falls on two narrow slits. The distance between the third dark fringe to the central bright on a screen is 3.5 mm. Distance between slits and screen is 160 cm. What is the spacing between the two slits?

4. (a) (i) A sodium light of wavelength 580 nm falls on two narrow slits. The distance between the third dark fringe to the central bright on a screen is 3.5 mm. Distance between slits and screen is 160 cm. What is the spacing between the two slits?

College Physics

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Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Diffraction of light

In physics, the term diffraction is defined as the bending of light around the corners of the obstacle. As a light ray passes by an aperture, it bends around the edges or through slits, it spreads out through a narrow opening. The diffracted light will produce fringes of bright and dark or colored bands which are labeled as a diffraction pattern.

Question

4. (a)
(i) A sodium light of wavelength 580 nm falls on two narrow slits. The distance
between the third dark fringe to the central bright on a screen is 3.5 mm. Distance
between slits and screen is 160 cm. What is the spacing between the two slits?
(ii) Solar cells are an example of anti-reflective coatings. Let a silicon solar cell (n
= 3.45) coated with a layer of silicon dioxide (n = 1.45). Calculate the minimum
coating thickness that will minimize the reflection of the light with wavelength
of 650 nm?

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