1. What will be the energy of light whose wavelength is 575 nm? 2. What will be

Question

1. What will be the energy of light whose wavelength is 575 nm? 2. What will be the frequency of a photon whose energy is 3.8 1018 1? 3. Using Bohr's equation for the energy levels of the electron in the hydrogen atom, determine the energy (U) of an electron in the n 4 level. 4. What is the De Broglie wavelength (m) of a 2.0 kg object moving at a speed of 35 m/s? possible values for the magnetic quantum number of an electron in a 4f 5. There are_ subshell 6. What will be the wavelength of light emitted when an electron transitions from n 3 to n-2 level?

Explanation / Answer

I have already solved the first one , let me help you out with the next

Ans 2 :

E = h .c / wavelength

so putting all the values:

3.8 x 10-18 = (6.626 x 10-34 x 3 x 108) / w

w = 5.23 x 10-8 m

or 52.3 nm

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