Chapter 25: Q24CQ (page 928)
What is meant by a negative magnification? What is meant by a magnification that is less than 1in magnitude?
Negative magnificence is inverted, and the picture is usually smaller than the item.
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At what minimum angle will you get total internal reflection of light traveling in water and reflected from ice?
Will light change direction toward or away from the perpendicular when it goes from air to water? Water to glass? Glass to air?
On the Moon’s surface, lunar astronauts placed a corner reflector, off which a laser beam is periodically reflected. The distance to the Moon is calculated from the round-trip time. What percent correction is needed to account for the delay in time due to the slowing of light in Earth’s atmosphere? Assume the distance to the Moon is precisely, and Earth’s atmosphere (which varies in density with altitude) is equivalent to a layer 30.0 kmthick with a constant index of refraction n=1.000293.
You can often see a reflection when looking at a sheet of glass, particularly if it is darker on the other side. Explain why you can often see a double image in such circumstances.
What is the focal length of a makeup mirror that produces a magnification of \(1.50\)when a person’s face is \(12.0\;cm\) away? Explicitly show how you follow the steps in the Problem-Solving Strategy for Mirrors.
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