The center of the Milky Way lies in the direction of the constellation Cygnus
Indicate whether the statement is true or false
FALSE
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Photoelectric Effect: A blue laser beam is incident on a metallic surface, causing electrons to be ejected from the metal. If the frequency of the laser beam is increased while the intensity of the beam is held fixed,
A. the rate of ejected electrons will decrease and their maximum kinetic energy will increase. B. the rate of ejected electrons will remain the same but their maximum kinetic energy will increase. C. the rate of ejected electrons will increase and their maximum kinetic energy will increase. D. the rate of ejected electrons will remain the same but their maximum kinetic energy will decrease.
Pat is viewing the moon with her new telescope. She is using a 10. mm eyepiece. Which of the following eyepieces will double the magnification?
A) 40. Diopter B) 8. mm C) 200. Diopter D) 12. mm E) 5. Diopter
What is the spectral type of a main sequence star with a luminosity 100 times greater than the sun?
A) G B) A C) M D) O
Light strikes a 5.0-cm thick sheet of glass at an angle of incidence in air of 50°. The sheet has parallel faces and the glass has an index of refraction 1.50
(a) What is the angle of refraction in the glass? (b) After traveling through the glass the light re-emerges into the air. What is the final angle of refraction in air? (c) As it leaves the glass, by what distance is the path of the ray is displaced from what it was before entering the glass?