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1) If a star has a surface temperature of thousand kelvin what is the wavelength to the nearest nanometer of the peak of its radiation spectrum?
2) What is the energy of a photon to the nearest tenth of a eV whose wavelength is nm?
3) What are the number of photons reaching the earth per square meter in one second from the Sun if the solar intensity is 1400 W/m2 and all the photons have the wavelength given in question 2? Give your answer in scientific notation to 2 decimal places (i.e., 123456 would be 1.23e5)

4) X-rays of wavelength 0.1500 nm undergo compton scattering at degrees, what is the wavelength of the scattered photons to the nearest ten thousandth of a nm?
5) What is the change in energy to the nearest eV of the X-ray photons in the previous question?

6) What is the maximum wavelength, in units of 10 -15 m (to 2 decimal places), that a photon may possess and still be able to produce a positively charged particle of rest-mass energy equal to Mev and its antiparticle?

7) For an electron in the th quantum energy level in hydrogen, what is the wavelength to the nearest nanometer of an emitted photon belonging to the Paschen series?
8) What would be the answer to the previous question if it was the Balmer series?

9) What is the deBroglie wavelength in units of 10-15 meters (to one decimal place) of a proton with a kinetic energy of MeV?
10) What would be the answer to problem 9 to the nearest fm if the particle was an electron?