3. What is the energy of a photon whose frequency is 5.2 x 1015 Hz? Use the equation: E=hxv h=6.626 1034 J xs
4. What is the frequency of radiation whose wavelength is 2.40 x 105 cm? v=c=X
C= 3 x 108m/

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.

Could you provide a photo?