Chapter 5: Q1E (page 1151)
A candle tall is to the left of a plane mirror. Where is the image formed by the mirror, and what is the height of this image?
Short Answer
The distance of the image from the candle is .
Chapter 5: Q1E (page 1151)
A candle tall is to the left of a plane mirror. Where is the image formed by the mirror, and what is the height of this image?
The distance of the image from the candle is .
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Get started for freeA concave mirror has a radius of curvature of 34.0cm. (a) What is its focal length? (b) If the mirror is immersed in water (refractive index 1.33), what is its focal length?
On December 26, 2004, a violent earthquake of magnitude 9.1 occurred off the coast of Sumatra. This quake triggered a huge tsunami (similar to a tidal wave) that killed more than 150,000 people. Scientists observing the wave on the open ocean measured the time between crests to be 1.0 h and the speed of the wave to be 800 km>h. Computer models of the evolution of this enormous wave showed that it bent around the continents and spread to all the oceans of the earth. When the wave reached the gaps between continents, it diffracted between them as through a slit.
(a) What was the wavelength of this tsunami?
(b) The distance between the southern tip of Africa and northern Antarctica is about 4500 km, while the distance between the southern end of Australia and Antarctica is about 3700 km. As an approximation, we can model this wave’s behavior by using Fraunhofer diffraction. Find the smallest angle away from the central maximum for which the waves would cancel after going through each of these continental gaps.
A salesperson at a bargain counter claims that a certain pair of sunglasses has Polaroid filters; you suspect that the glasses are just tinted plastic. How could you find out for sure?
You use a lens of diameter and light of wavelength and frequency to form an image of two closely spaced and distant objects. Which of the following will increase the resolving power? (a) Use a lens with a smaller diameter; (b) use light of higher frequency; (c) use light of longer wavelength. In each case justify your answer.
Could x-ray diffraction effects with crystals be observed by using visible light instead of x-rays? Why or why not?
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