Exercises

What is the speed of light while traveling through (a) waterAnswer and (b) iceAnswer?
How many minutes are required for sunlight to reach the earth if the sun is 1.50 x 10⁸ km from the earth? Answer
How many hours are required before a radio signal from a space probe near the planet Pluto reaches Earth, 6.00 x 10⁹ km away? Answer
A light ray is reflected from a mirror with an angle 10° to the normal. What was the angle of incidence? Answer
Light travels through a transparent substance at 2.20 x 10⁸ m/s. What is the substance? Answer
The wavelength of a monochromatic light source is measured to be 6.00 x 10²⁷ m in a diffraction experiment. (a) What is the frequency?Answer (b) What is the energy of a photon of this light? Answer
At a particular location and time, sunlight is measured on a 1 square meter solar collector with an intensity of 1,000.0 W. If the peak intensity of this sunlight has a wavelength of 5.60 x 10²⁷ m, how many photons are arriving each second? Answer
A light wave has a frequency of 4.90 x 10¹⁴ cycles per second. (a) What is the wavelength?Answer (b) What color would you observe (see Table 8.2)? Answer
What is the energy of a gamma photon of frequency 5.00 x 10²⁰ Hz? Answer
What is the energy of a microwave photon of wavelength 1.00 mm? Answer

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