Knowing that the human eye can see with a signal of 100 photons per second, how far away can a 100 Watt lgiht bulb be seen by a dark-adapted eye? Use a rough estimate for the diameter of the dark-adapted pupil of the human eye. Assume the following: The light bulb is in outer space, so the light isn't scattered by the atmosphere The light bulb is monochromatic and radiates at a wavelength of 550 nm.
Compton effect
The incoming photons' energy must be in the range of an X-ray frequency to generate the Compton effect. The electron does not lose enough energy that reduces the wavelength of scattered photons towards the visible spectrum. As a result, with visible lights, the Compton effect is missing.
Recoil Velocity
The amount of backward thrust or force experienced by a person when he/she shoots a gun in the forward direction is called recoil velocity. This phenomenon always follows the law of conservation of linear momentum.
Knowing that the human eye can see with a signal of 100 photons per second, how far away can a 100 Watt lgiht bulb be seen by a dark-adapted eye? Use a rough estimate for the diameter of the dark-adapted pupil of the human eye.
Assume the following:
- The light bulb is in outer space, so the light isn't scattered by the atmosphere
- The light bulb is monochromatic and
radiates at a wavelength of 550 nm.
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