The bright and dark bands you see in a photograph of a double slit interference pattern represent
a. the respective positions of the crests and the troughs of the light wave.
b. an interference pattern that is not present unless it is produced by the camera lens.
c. the respective positions of constructive and destructive interference of light from the two sources.
d. the respective positions of destructive and constructive interference of light from the two sources.
e. the respective positions of bright and dark particles of light.
c
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A 500-N parachutist opens his chute and experiences an air resistance force of 800 N. The net force on the parachutist is then
A) 300 N downward. B) 500 N downward. C) 800 N downward. D) 300 N upward. E) 500 N upward.
A 3rd magnitude star appears 2.5 times brighter than a 4th magnitude star
Indicate whether the statement is true or false
Which of the following best represents the energy transformations occurring in a coal-fired power plant?
A) thermal ? chemical ? electric B) gravitational ? thermal ? electric C) chemical ? electric ? thermal D) chemical ? thermal ? electric E) electric ? thermal ? chemical
An "onion skin" shell burning structure develops in:
A. a star much less massive than the Sun. B. a white dwarf. C. a star like the Sun. D. a neutron star. E. a star much more massive than the Sun.