For which of these scenarios is the wave model of light more convenient to use?
A. refraction of light through a lens
B. diffraction of light through a slit
C. receiving radio transmissions
D. the Doppler shift of light
E. All of these choices are correct.
Answer: E
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Impedance: In a series RLC ac circuit, a second resistor is connected in parallel with the resistor previously in the circuit. As a result of this change, what happens to the impedance of the circuit?
A. It increases. B. It decreases. C. It does not change. D. It increases for frequencies below resonance and decreases for frequencies above resonance. E. It decreases for frequencies below resonance and increases for frequencies above resonance.
If two electrons in an atom have the same energy, then they must have the same four quantum numbers
A) True B) False C) They cannot both have the same energy.
How much longer does the Sun have to live?
A: About a month- no need to study for finals! B: About 2 years- are you going to graduate in time? C: About a million years- not too much to worry about. D: About 5.5 billion years- what is humanity going to be like? E: The Sun won't die- how silly is that?
Which of the following is not a major idea of Einstein's general theory of relativity?
A) It is possible to travel through wormholes. B) Time runs slower near strong gravitational fields. C) Our universe can have no center or boundaries, yet be finite. D) Black holes can exist in spacetime, and falling into a black hole means leaving the observable universe. E) Large masses that undergo rapid changes in motion or structure can emit gravitational waves that travel at the speed of light.