Why is it easier to see fine print in brighter light than in dimmer light?
a. This is not so, it is easier to see fine print in dimmer light than in brighter light.
b. Because the power (in diopters) of the eye increases as the light intensity increases.
c. In brighter light, the longer wavelengths dominate.
d. In brighter light, the f-number of the eye increases.
d
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This figure shows an all-sky map of the cosmic microwave background recorded by the Planck telescope. How long did this light travel through space before it reached the telescope?
A) about 14 billion years B) about 380,000 years C) about a million years D) Depending on what portion of the map we're looking at, the light traveled for times between just a few minutes and a few billion years.
In a thermally insulated kitchen, an ordinary refrigerator is turned on and its door is left open. The temperature of the room:
A. remains constant according to the first law of thermodynamics B. increases according to the first law of thermodynamics C. decreases according to the first law of thermodynamics D. remains constant according to the second law of thermodynamics E. increases according to the second law of thermodynamics
The deepest depression found on the surface of Mars is the:
A) Mariannas Trench. B) Caloris basin. C) Valles Marineris rift. D) Hellas Basin of Mars. E) Mare Crisium.
Which of the following elements would be expected to be most stable?
A) Platinum-195 B) Iron-56 C) Carbon-12 D) Bismuth-209 E) Helium-3