Where must an object be placed to form an erect image with a concave mirror?
The object must be placed inside the focal point.
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An estimate of the minimum age of the solar system can made by measuring the ages of
A) zircon crystals B) meteorites C) comets D) asteroids
In order for a color to be visible in thin film interference, the wavelength of that color must
A. Satisfy the destructive interference conditions B. Satisfy the constructive interference conditions C. Be smaller than the thickness of the film D. Be larger than the thickness of the film
Consider the equipotential diagram shown in problem E3T.12. In the expression , what is the approximate value of b?
A. 8
B. 2
C. 0
D. 1/2
E. 1/8
F. Some other value (specify)
When a positronium atom (electron + positron) decays, it emits two photons. What are the energies of the photons?
A) 0.511 MeV and 1.022 MeV B) 0.225 MeV and 1.022 MeV C) 0.225 MeV and 0.285 MeV D) 0.256 MeV and 0.256 MeV E) 0.511 MeV and 0.511 MeV