A light of wavelength 5000 angstrom

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What are the wavelength and frequency of the reflected light? For what angle of incidence is the reflected ray normal to the incident ray? The wavelength and frequency of incident light is the same as that of reflected ray. When reflected ray is normal to incident ray, the sum of the angle of incidence, ang. What is the force between two small charged spheres having charges of 2 x 10 -7 C and 3 x 10 -7 C placed 30 cm apart in air?

A light of wavelength 5000 angstrom

The number of incident photons N per second per square metre is therefore:. Here is an alternate approach. Here we assume that the work function is overcome by the incoming light energy Note that the work function was not stated, so we must assume that it is overcome by the incoming light energy The light wavelength angstroms should be represented in "m" , as Planck's constant has "m". Therefore, the energy contained in one photon of that wavelength is:. Now, the intensity of light can be treated as if it were an energy value for all the photons involved, since we retain all the units beyond "J". Jun 18, Truong-Son N. Related questions How do I determine the molecular shape of a molecule? What is the lewis structure for co2? What is the lewis structure for hcn?

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A light of wavelength 5000 angstrom

Treat the speed of light as , miles per second. The first step is always to write out the data. All that we need to know is in the problem:. The third step is unit conversion. The units are fine just the way they are in this problem, so we can skip this step. Once we get our answer in miles per sec, we will have to convert that to miles per hour. In order to make the red light appear green, we would have to travel at almost one-quarter of the speed of light, ,, miles per hour! There is a story about a man who tried to trick a judge into letting him out of a ticket by saying that he was going so fast that the Doppler Effect made the red light appear green to him.

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The Sun emits light in all colors, but since yellow is the brightest wavelength from the sun, that is the color we see with our naked eye. Specialized instruments can observe light far beyond the ranges visible to the naked eye. Updated multiple times daily.

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