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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Energy conservation tells us that the energy of a system can change via
A. Heat transfer B. The energy of a system cannot change C. Work done and/or heat transfer D. Work done on or by the system
Two converging lenses, the first with focal length 25 cm and the second with focal length 20 cm, are separated by 30 cm. A 4.0 cm tall object is placed 50 cm in front of the first lens. Where is the image caused by the first lens? Give the most inclusive answer.
A. 50 cm after the first lens B. 20 cm after the second lens C. both 50 cm after the first lens and 20 cm after the second lens D. 50 cm after the second lens E. 20 cm before the second lens
The most energy per unit mass can be extracted from
A) coal. B) petroleum. C) natural gas. D) uranium.
In Diagram 6-1, which of the transitions would absorb a photon with the smallest energy?