1. a)
b) Δr = r2-r1
c) Δr = dsinθm = mλ
d)
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Last week we finished the second lab using the ray model of light or geometrical optics. This week’s lab examines the wave nature of light in detail. Refer to Chapter 17 of your textbook if you need to remind yourself of any concepts. Waves including light and sound exhibit interference which is an effect of two or more waves being superimposed or added at the same location and time.
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- a) b) Δr = r 2 -r 1 c) Δr = dsinθm = mλ d)
- a) Graph; The frequency of the red source is lower than that of the violet light. However, the decrease in amplitude is faster for the violet light than for the red light.
a) The violet color will be closer to the central maximum since it has a smaller wavelength and therefore a smaller diffraction angle from the central maximum. b)
There are seven splits. In the first order, there are rainbows with the violet light closes to the central maxima marked by white light. The additional orders m2 and m3 are less sharp than the higher order maxima.
Violet light produces the clearest, least fuzzy image. This may be explained by varying wavelengths. Red light has a higher wavelength that violet light. Violet light therefore is refracted at a smaller angle than red light.