Teachers Notes:

Problem 1:
Using the equation c = λν, determine frequency in Hertz or sec^-1

a. green light: 3.00 x 10⁸m/sec x (1/557.7 nm) x (1nm/1 x 10^-9m) = 5.38 x 10¹⁴Hz or sec^-1
b. red light: 3.00 x 10⁸m/sec x (1/630.0 nm) x (1nm/1 x 10^-9m) = 4.76 x 10¹⁴Hz or sec^-1

Problem 2:
Using the equation E = hν or E = hc/λ determine energy of the photon

a. green light: 6.626 x 10^-34Jsec x (5.38 x 10¹⁴sec^-1)= 3.56 x 10^-19J
or 6.626 x 10^-34Jsec x (3.00 x 10⁸m/sec) x (1/557.7 nm) x (1nm/1 x 10^-9m) = 3.15 x 10^-19J
b. red light: 6.626 x 10^-34Jsec x (4.76 x 10¹⁴sec^-1)= 3.56 x 10^-19J
or 6.626 x 10^-34Jsec x (3.00 x 10⁸m/sec) x (1/630.0 nm) x (1nm/1 x 10^-9m) = 3.15 x 10^-19J