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How many photons of wavelength lamda is equals to 6600 nm must strike a totally reflecting screen per second at normal incidence. So as to exert a force of 1 N?
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How many photons of wavelength lamda is equals to 6600 nm must strike ...
Calculating the Energy of a Photon

To answer this question, we first need to calculate the energy of a photon of wavelength λ. We can use the following equation to do this:

E = hc/λ

Where E is the energy of the photon, h is Planck's constant (6.626 x 10^-34 J.s), c is the speed of light (3.00 x 10^8 m/s), and λ is the wavelength of the photon in meters.

Calculating the Number of Photons Needed

Once we know the energy of a single photon, we can use the following equation to calculate the number of photons needed to exert a force of 1 N:

N = F/E

Where N is the number of photons needed, F is the force (in Newtons), and E is the energy of a single photon (in Joules).

Putting it all Together

For a photon of wavelength λ = 6600 nm, we can calculate the energy as follows:

E = (6.626 x 10^-34 J.s)(3.00 x 10^8 m/s)/(6600 x 10^-9 m) = 3.01 x 10^-19 J

Using the equation above, we can then calculate the number of photons needed to exert a force of 1 N as:

N = 1/(3.01 x 10^-19 J) = 3.32 x 10^18 photons/second

Therefore, 3.32 x 10^18 photons with a wavelength of 6600 nm must strike the totally reflecting screen per second at normal incidence in order to exert a force of 1 N.
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How many photons of wavelength lamda is equals to 6600 nm must strike a totally reflecting screen per second at normal incidence. So as to exert a force of 1 N?
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