A magician can make a candle look as if it is burning under water by focusing light from a candle flame burning in air directly on top of an underwater candle. To do this you want to use a (Hint: eliminate those that cannot work.)
a. concave mirror farther than one focal length from the burning candle.
b. a convex mirror farther than one focal length from the burning candle.
c. a biconcave lens farther than one focal length from the burning candle.
d. a concave mirror closer than one focal length to the burning candle.
e. a convex lens closer than one focal length to the burning candle.
a
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During an adiabatic compression, does a gas’s temperature increase, decrease, or remain the same?
A. It increases. B. It decreases. C. It remains the same.
What is left when a planetary nebula dissipates?
A. a neutron star B. a black hole C. a red giant D. a white dwarf
In alpha decay,
A) a proton turns into a neutron B) a neutron turns into a proton C) a proton turns into an electron D) a helium nucleus is ejected
If sunlight of color B is scattered through an angle 16 times greater than sunlight of color A, then the wavelength of color B is
A) twice that of color A. B) 1/2 that of color A. C) 16 times that of color A. D) 1/16 that of color A. E) 1/4 that of color A.