A diffraction grating with 10,000 lines/cm will exhibit the first order (m = 1) maximum for light of wavelength 264 nm at what angle? (1 nm = 10-9 m)
a. 15.3°
c. 0.51°
b. 0.62°
d. 31°
A
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Only very small amounts of infrared and ultraviolet light can penetrate all the way to the ground. Based on the diagram, which statement is true?
A) A small percentage of the incoming light at every infrared and ultraviolet wavelength reaches the ground, while the remaining light at the same wavelengths does not reach the ground. B) Most infrared and ultraviolet wavelengths do not reach the ground at all; the only wavelengths that do are the ones closest to the visible portion of the spectrum. C) Most infrared and ultraviolet wavelengths do not reach the ground at all; the only wavelengths that do are the ones closest to the radio and x-ray portions of the spectrum.
Which terrestrial world has the most atmosphere?
A) Venus B) Earth C) Mars D) Mercury.
Identical masses m are attached to identical springs of spring constant k suspended from the ceiling. With both masses hanging in their equilibrium positions, mass A is pulled down 10 cm and released while mass B is pushed up 10 cm and released. Which statement is correct?
a. Mass A will travel a smaller distance to its highest point than mass B will travel to its lowest point. b. Mass A will travel a greater distance to its highest point than mass B will travel to its lowest point. c. Masses A and B will travel equal distances between their highest and lowest points. d. More work was done on mass A by the extending force than on mass B by the compressing force. e. The total work done on mass A by the extending force was equal to the total work done on mass B by the compressing force.
A lamp rated 23W 120V means that it will deliver 23 W
A) when the voltage across it is 120 V. B) whether or not it is connected to 120 V. C) as long as the current is ac. D) none of the above