A true statement about the modern theory of light is that
A. light waves do not carry energy but photons can.
B. light can behave like a wave or a particle depending on the situation.
C. light can only behave like a particle in atoms.
D. photons do not have a frequency.
Answer: B
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What is the critical angle for diamond (n = 2.42)?
A. 2.42 
B. 67.5
C. 65.6
D. 24.4
E. 37.1
In their attempt to gauge the true shape of our Galaxy, the Herschels concluded that:
A) our Galaxy has a hexagonal shape. B) the Sun is the only luminous star in our Galaxy. C) the Sun and Earth are near the edge of our Galaxy. D) our Galaxy has some noticeable holes lacking stars around its edges.
The Hubble Space Telescope can detect Cepheids up to the distance of 100 Mpc
Indicate whether the statement is true or false
What would be the greatest effect on the ideal gas law if there is a slight repulsive force between the molecules?
A) At low temperatures, the pressure would be greater than that predicted by the ideal gas law. B) At high temperatures, the pressure would be greater than that predicted by the ideal gas law. C) At low temperatures, the pressure would be less than that predicted by the ideal gas law. D) At high temperatures, the pressure would be less than that predicted by the ideal gas law. E) There is no effect.