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A 200-W infrared laser emits photons with a wavelength of 1.05 multiply.gif 10-6 m, and a 200-W ultraviolet light emits photons with a wavelength of 3.51 multiply.gif 10-7 m.
(a) What is the energy of a single infrared photon?
J
(b) What is the energy of a single ultraviolet photon?
(c) How many infrared photons are emitted per second?
photons/s
(d) How many ultraviolet photons are emitted per second?
An ideal gas is expanded isothermally from 20L to 30L. During thismethod , 6J of energy is expended by the external mechanism that expanded the gas. Which of the statements is correct.
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