Question

2. A red laser pointer has a wavelength of 633 nm. Calculate the following: (3 pts) a. Energy of a photon from this laser pointer in b. Energy in kJ/mol photons c. Wavenumber in cm1

Answer 1

127 A cearding the plank Energy B and a ne where he blank constant . a 6.626 X 10 34 J. e a velocity of light = 3x10 m/s a hoo Energy of a photon from this laser pointer -Ez he [112 33 nm] - 34 = 6688 6.626 X10 x 38.10% 633 X4019 .::6,626 rio-T7 - 211 3,14 x

by Now energy of to 1 mote photon = 3:14x1019 x 6.02 3.X 1023 J/mole z 18.9122 x 10 / mole - 189. 122 kJ/moleon • we know that, wave number D 633 x 10 7 em - 15797.8 en