The critical angle for a particular type of glass is 39.0°. What is the index of refraction of the glass?
A)
1.52
B)
1.55
C)
1.57
D)
1.59
E)
1.50
D
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Telescope A has a mirror twice the diameter of telescope B's mirror. How does A's light-gathering power compare to B's?
A. A gathers 1/4th as much light as B does. B. A gathers 4 times the light that B does. C. A gathers 1/2 the light that B does. D. A gathers twice the light that B does.
Where does nuclear fusion occur in the Sun?
A) on the surface B) anywhere below the surface C) in its core D) just above the visible surface E) all of the above
In the proton-proton cycle, the positron is:
A) massless. B) a spin conservation particle. C) an anti-electron. D) the chief means energy reaches the photosphere. E) intermediate between the proton and neutron in mass.
In the conventional scenario, during phase of planet formation caused the jovian planets to form?
A) core-accretion B) fragmentation C) differentiation D) collision E) condensation