Physics, 16.09.2019 23:30 Lydiaxqueen
A100 w incandescent light bulb converts approximately 2.5% of the electrical energy supplied to it into visible light. assume that the average wavelength of the emitted light is λ = 540 nm, and that the light is radiated uniformily in all directions.
a) what is the energy of each photon in ev?
b)how many photons per second, n, would enter an aperture of area a = 2cm2 located a distance d = 5 m from the light bulb?
c)suppose, instead, that the average photon wavelength is 810 nm. how many photons per second, n', would enter the aperture?
Answers: 2
Physics, 22.06.2019 10:00
If a stone with an original velocity of 0 is falling from a ledgeand takes 8 seconds to hoybthe ground whays the final velocity of the stone
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Write a full page that sumerizes thermodynamics it’s from the website visionlearnig
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Physics, 22.06.2019 12:50
Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)
Answers: 2
A100 w incandescent light bulb converts approximately 2.5% of the electrical energy supplied to it i...
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