hw10_sol - 8(a The rate at which solar energy strikes the...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
8. (a) The rate at which solar energy strikes the panel is P == 139 260 361 .. . kW / m m kW. 22 c hc h (b) The rate at which solar photons are absorbed by the panel is () ( ) 3 34 8 9 ph 22 3.61 10 W 6.63 10 J s 2.998 10 m/s / 550 10 m 1.00 10 photons/s. P R E −− × ×⋅ × × (c) The time in question is given by t N R A × × = 602 10 100 10 60 2 23 22 . ./ . s s.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
10. Following Sample Problem 38-1, we have P Rhc == ×⋅ × × λ 100 6 63 10 2 998 10 550 10 36 10 34 8 9 17 /. . . sJ sm / s m W. bg ch c h
Background image of page 2
where E = hf and f = c / λ are used. Here h is the Planck constant, f is the frequency of the emitted light, and λ is its wavelength. Thus, R P hc == × ×⋅× λ 589 10 100 6 63 10 300 10 296 10 9 34 8 20 mW Js m /s photon / s. ch bg c hc h .. . (b) Let I be the photon flux a distance r from the source. Since photons are emitted uniformly in all directions, R = 4 π r 2 I and () 20 7 42 2.96 10 photon/s 4.86 10 m. 4 4 1.00 10 photon/m s R r I π × = × ×⋅ (c) The photon flux is I R r × 4 0 0 589 10 2 20 2 18 π π . . photon / s m photon ms 2 b g 11. (a) We assume all the power results in photon production at the wavelength
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/05/2011 for the course PHYSICS 133 taught by Professor Steigman during the Fall '09 term at Ohio State.

Page1 / 9

hw10_sol - 8(a The rate at which solar energy strikes the...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online