Hole creates the pattern shown below

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Unformatted text preview: is the image? (4 pts) b. Is it upright or inverted? c. What’s its magnification? (3 pts) (2 pts) 10. The diagram below shows an object and the (inverted) image of the object formed by a converging lens. a. Indicate on the diagram the location of the focal points of the lens. (2 pts) b. Carefully draw at least 4 rays that diverge from the tip ­top of the object, pass through the lens, and help to form the image. (Use a straight edge.) (4 pts) c. It’s possible to magnify the image further with a second converging lens. Indicate on the diagram where you would place the lens, and the proper locations of the focal points of the second lens, to create a final virtual image. (Be sure to distinguish from the focal points of the first lens.) (2 pts) Name__________________________________ 11. If you’re afflicted with myopia (nearsightedness), what type of corrective lens do you need? If your far point is 40 cm, what focal length corrective lens would allow you to form sharp images of distant objects? Explain. (4 pts) 12. Determine the energy of a 400 nm photon. (4 pts) 13. 5 eV photons shine on a metal surface of work function 3 eV. a. What’s the kinetic energy or range of kinetic energies of electrons would be emitted by the metal? (3 pts) b. (3 pts) Which of the following changes to the incident light would result in emitted electrons of greater kinetic energy? i. doubling the intensity ii. doubling the frequency iii. both iv. neither c. (3 pts) Which of the following changes to the incident light would result in no emitted electrons? i. cutting the intensity in half ii. doubling the wavelength iii. both iv. neither...
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This note was uploaded on 09/15/2013 for the course PHYS 112 taught by Professor Cui during the Fall '08 term at UMBC.

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