Estimate light, eletron, neutron beams energy

[limany]

Homework Statement

estimate light, eletron, neutron beams energy to use 'order - of - magnitude'
[eV]

Homework Equations

E = hv

The Attempt at a Solution

E = hv where h is Plancks constant and v is frequency and E is energy
6573 angstroms = 6.573 e-7 m = wavelength (λ)

First we must use: v = c/λ where c is the speed of light
v = (3.00 e8 m/s)/(6.573 e-7 m) = 4.564e14/s

E = (6.63 e-34 J x s)(4.564 e14/s) = 3.026 e-19 J





I don't know how can i solve it
how can i calculate el, neu?

 

[mark726]

To estimate the energy of a light beam, we can use the formula E = hv, where h is Planck's constant and v is the frequency of the light. The frequency of a light beam can be calculated using the formula v = c/λ, where c is the speed of light and λ is the wavelength of the light beam.

For example, let's estimate the energy of a red light beam with a wavelength of 700 nanometers (nm). Using the formula v = c/λ, we can calculate the frequency of this light beam:

v = (3.00 x 10^8 m/s)/(700 x 10^-9 m) = 4.29 x 10^14 Hz

Now, we can use the formula E = hv to calculate the energy:

E = (6.63 x 10^-34 J x s)(4.29 x 10^14 Hz) = 2.84 x 10^-19 J

To estimate the energy of an electron beam, we can use the formula E = 1/2mv^2, where m is the mass of the electron and v is its velocity. The mass of an electron is 9.11 x 10^-31 kg, and its velocity can vary depending on the specific situation. For example, in a cathode ray tube, electrons can have velocities of around 10^7 m/s.

Using these values, we can estimate the energy of an electron beam:

E = 1/2(9.11 x 10^-31 kg)(10^7 m/s)^2 = 4.55 x 10^-24 J

To estimate the energy of a neutron beam, we can use the formula E = 1/2mv^2, where m is the mass of the neutron and v is its velocity. The mass of a neutron is 1.67 x 10^-27 kg, and its velocity can also vary depending on the specific situation.

For example, in a nuclear reactor, neutrons can have velocities of around 10^6 m/s. Using these values, we can estimate the energy of a neutron beam:

E = 1/2(1.67 x 10^-27 kg)(10^6 m/s)^2 = 8.35 x 10^-22 J

Remember that these are just estimates and the actual energy may vary based on the specific situation. It is also important to