Answer to Question #165640 in General Chemistry for Maddy Brown

Question

A stellar object is emitting radiation at 1020 nm. A detector is capturing 6 x 10^7 photons per second at this wavelength. h=6.63 x 10^-34 J-s. c=2.998 x 10^8 m/s.

A) What is the total energy of the photons detected in one second?

B) What is the total energy of the photons detected in one hour?

Answer 1

1. E= hc/¥ = 6.63x10^-34 x 2.998x10⁸/1020x10^-9

= 1.95x10^-19J/s

2. Energy detected in one hour,

Since 1hour= 3600s

Energy= 1.95x10^-19 x 3600

= 7.0 x 10^-16J/hr