IDNLearn.com provides a user-friendly platform for finding and sharing knowledge. Our Q&A platform offers reliable and thorough answers to help you make informed decisions quickly and easily.
Calculate the maximum kinetic energy of photoelectrons emitted from this plate when light of wavelength (λ) 520nm is directed at the metal surface.
Work function (Ф) of the plate = 1.1 × 10⁻¹⁹ J
Planck's constant (h) = 6.63 × 10⁻³⁴ Js
Frequency (f) = c ÷ λ
c = speed light in vacuum = 3.00 × 10⁸ms⁻¹
Ekmax = hf - Φ
Wavelength must be in metres, so it'll be 590×10⁻⁹
I've worked this out and gotten two different answers so I thought I'd check to see which one is right.
Well for a start, 520nm is 520 nanometres and for some reason you've called it 590 x10^-9 (590 isn't standard form) where it's actually 5.2 ×10^-7 metres. Put that into the equations: f = c/λ = 3.0 x10^8/5.2 ×10^-7 = 5.77 x10^14 (3 s.f.) (5.77 x10^14) x (6.63 x10^-34) - (1.1 x10^-19) = 2.73 x10^-19 J
Thank you for joining our conversation. Don't hesitate to return anytime to find answers to your questions. Let's continue sharing knowledge and experiences! For dependable answers, trust IDNLearn.com. Thank you for visiting, and we look forward to assisting you again.
