True or False: A photon is reflected from a mirror. Although the photon carries momentum, its change in momentum is zero when it reflects from the mirror, so it can't exert a force on the mirror
1.True
2.False
2
You might also like to view...
A planetary nebula is
a. the expelled outer atmosphere of a medium-mass star. b. produced by a supernova explosion. c. produced by a nova explosion. d. a nebula within which planets are forming. e. a cloud of hot gas surrounding a planet.
What is the inductance of a series RL circuit in which R = 1.0 K? if the current increases to one-third of its final value in 30 ?s?
a. 74 mH b. 99 mH c. 49 mH d. 62 mH e. none of the above
Both protons and neutrons (and their anti-particles) froze out:
A) after 10-43 seconds, at the Planck Era. B) at 1032 K, at the end of the Inflationary Era. C) at 1013 K, about .0001 seconds after the Big Bang. D) after about a minute of expansion. E) about 50,000 years after the Big Bang.
Fluid Flow: Ideal incompressible water is flowing in a drainage channel of rectangular cross-section. At one point, the width of the channel is 12 m, the depth of water is 6.0 m, and the speed of the flow is 2.5 m/s. At a point downstream, the width has narrowed to 9.0 m, and the depth of water is 8.0 m. What is the speed of the flow at the second point?
A. 2.0 m/s B. 2.5 m/s C. 3.0 m/s D. 3.5 m/s E. 4.0 m/s