A star's luminosity is the
A) total amount of energy that the star radiates each second.
B) total amount of energy that the star will radiate over its entire lifetime.
C) surface temperature of the star.
D) lifetime of the star.
E) apparent brightness of the star in our sky.
A
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Compare the prediction of the Bohr theory with the Schrödinger theory of the hydrogen atom concerning the angular momentum of the ground state (similarity or difference)
What will be an ideal response?
About 1350 W/m2 of electromagnetic energy reaches the upper atmosphere of the earth from the sun, which is 1.5 × 1011 m away
Use this information to estimate the average power output of the sun. A) 1 × 1026 W B) 2 × 1026 W C) 3 × 1026 W D) 4 × 1026 W
A sheet of red paper will look black when illuminated with
A) red light. B) yellow light. C) magenta light. D) cyan light. E) none of the above
Two flat rectangular mirrors are set edge to edge and placed perpendicular to a flat nonreflecting surface. A light ray that reflects from mirror 1 at angle qM1 then strikes the second mirror and reflects at qM2 such that the angle between the ray reaching mirror 1 and the ray leaving mirror 2 is 180°. The angle between the two mirrors is
a. 0°. b. 45°. c. 90°. d. 150°. e. 235°.