What is white light? Why do we perceive different colors with a prism?
What will be an ideal response?
White light is composed of all the colors blended together uniformly. The colors are all present, as is shown when a prism spreads them back apart; each color corresponds to a different wavelength of EM radiation.
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With the x axis horizontal and the y axis vertically upward, the change in the horizontal component of velocity, ?vx, and the change in the vertical component of velocity, ?vy, of a projectile are related to the time since leaving the barrel, ?t, as
A. ?vx = 0; ?vy = 0. B. ?vx = g?t; ?vy = 0. C. ?vx = 0; ?vy = g?t. D. ?vx = 0; ?vy = ?g?t. E. ?vx = g?t; ?vy = ?g?t.
If the Sun ceased to generate nuclear fusion in its core, the Sun would immediately begin to collapse inward
a. True b. False Indicate whether the statement is true or false
When the alignment of the Sun, the Moon, and Earth produce a lunar eclipse, the body that is in between the other two is the
A) Sun. B) Moon. C) Earth.
Electrons in a particle beam each have a kinetic energy of 4.0 × 10^?17 J. What is the magnitude of the electric field that will stop these electrons in a distance of 0.3 m? (e = 1.6 × 10^?19 C)
a. 1.9E+3 N/C b. 7.5E+3 N/C c. 8.3E+2 N/C d. 1.3E+3 N/C e. 6.3E+3 N/C