Below you will find a set of 5 conceptual and numerical revision questions selected randomly from lots of questions I have put together covering the material in Chapter 31, "Properties of Light". This includes questions on energy, reflection, refarction and polarization. When you have finished the quiz, click on the "Submit Quiz" button at the bottom and within seconds it will be automatically graded and the results returned to you!

To select a new set of questions click on the "Reload" or "Refresh" button on your browser. You may find some of the questions duplicated but that's the nature of a random selection. Try it a few times ... it's not fattening and you may learn something!

Many thanks to Mark Wood for producing the quiz-maker code.

Q1: The photon energy for light of wavelength 500 nm is approximately (1 eV = 1.6 × 10^-19 J):

1.77 eV
3.10 eV
6.20 eV
2.48 eV
5.46 eV

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Q2: Which one of the following expressions determines the critical angle for quartz (n = 1.5) immersed in oil (n = 1.1)?

1.5/1.1
1.1/1.5
sin^-1(1.1/1.5)
sin(1.1/1.5)
tan^-1(1.1/1.5)

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Q3: A beam of light that consists of a mixture of red, green and violet light strikes a prism (surrounded by air) as shown. Indices of refraction for this prism for the various colors are indicated in the table. An observer is located to the right of the prism as shown.

Which color(s) could, in principle, be seen by the observer?

only red light
only green light
only violet light
only red and green light
only green and violet light

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Q4: What is the Brewster angle if light is reflected from a plastic plate (n = 1.575) submerged in ethyl alcohol (n = 1.362)?

68.3°
40.8°
59.8°
30.1°
49.1°

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Q5: The index of refraction of plate glass is 1.50. The polarizing angle for light incident from air is

8.6°
33.7°
56.3°
81.5°
90°

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