What is the photon energy of red light having wavelength 640 nm?
A. 1.13 ˛ 10-19 J
B. 1.31 ˛ 10-19 J
C. 3.11 ˛ 10-19 J
D. 1.94 ˛ 10-19 J
Answer:C
What is the photon energy of red light having wavelength 640 nm?
A. 1.13 ˛ 10-19 J B. 1.31 ˛ 10-19 J C. 3.11 ˛ 10-19 J D. 1.94 ˛ 10-19 J