The graph below shows the intensity on a screen behind a 0.2 slit illuminated by

Question

The graph below shows the intensity on a screen behind a 0.2 slit illuminated by light with a 500 mm wavelength. Draw a picture of how a photograph taken at this location would look. Use the same horizontal scale, so that your picture aligns with the graph above. Let the white of the paper represent the brightest intensity. b. Using the same horizontal scale a sin part a, draw graphs showing the light intensity if (a is slit width): lambda = 250 nm, a = 0.2 mm lambda= 1000 nm, a = 0.2 mm lambda = 500 nm, a = 0.1 mm lambda = 500 nm, a = 0.4 mm

Explanation / Answer

Light intensity = 2 * [(0.2 * 10-3)2/(250 * 10-9)]

                        = 0.32 W/m2

Light intensity = 2 * [(0.2 * 10-3)2/(1000 * 10-9)]

                        = 0.08 W/m2

Light intensity = 2 * [(0.1 * 10-3)2/(500 * 10-9)]

                        = 0.04 W/m2

Light intensity = 2 * [(0.4 * 10-3)2/(500 * 10-9)]

                        = 0.64 W/m2

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