the answer please

1. What will be the energy of a photon which corresponds to the wavelength of 0.50 A*? 3.98x10 10-15, 3x1015, 3.9x108, O 3x10 34, 2 What wavelength (in nanometers) is the peak intensity of the light coming from a star whose surface temperature is 11.000 Kelvin? 280 nm o 263 um 290 nm 300 nm