When you increase only the frequency of the incoming light onto the emitter, you measure
Changes in stopping voltage change the necessary energy to bridge the emitter-collector gap. The increase in the frequency of light means that the ejected electrons have greater kinetic energy. An increase in the necessary stopping voltage would mean that the most energetic electrons—the new, higher energy electrons—would bridge the gap. Since the increase in frequency will not free more electrons, the current should stay the same.
C.
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What information does 21 cm radiation provide about the gas clouds?
A) their motion B) their distribution C) their density D) their temperature E) all of these
The idea that other civilizations are waiting for us to reach a certain technological level before revealing themselves to us is referred to as the
A) conspiracy hypothesis B) UFO hypothesis C) sentinel hypothesis D) zoo hypothesis
The large, dark mare on Ganymede were created by water that erupted from within the moon
Indicate whether the statement is true or false
Co-generation has the advantage that ________
a. more energy is generated than is put into the system b. the overall efficiency of the energy conversion process increases c. more waste heat is generated d. solar energy can be utilized to a greater extent