What is meant by the event horizon?
What will be an ideal response?
When a mass has contracted to a certain radius, the Schwartzschild radius, gravity at its surface is so high that the escape velocity is the speed of light. The event horizon is the imaginary surface of a sphere with this radius. Even if the mass continues shrinking, anything passing inside this radius cannot escape the pull of gravity.
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Test the K+ and a Cl– interionic potential that you developed for Problem 2.25 by determining the equilibrium interionic separation, and comparing this value to the experimental value of 0.266 nm.
What will be an ideal response?
On an H-R diagram, a red supergiant would be located in the
A) upper right. B) upper left. C) lower left. D) lower right.
Growth is both good and inevitable
What will be an ideal response?
What is the effect of increasing the wavelength in an interference pattern?
a. There is no effect; to change the pattern, you have to change the frequency, not the wavelength. b. The nodal lines move closer to the central line. c. The pattern seen disappears. d. The image gets more blue-violet and less red. e. The interference pattern is wider for the longer wavelength.