Maximum wavelength in angstroms

[Kailyncanez3G]

how do you calculate the maximum wavelength in angstroms of the radiation that will eject electrons from the metal using 3.750x 10-19J.

[Ahmad Almuti 3K]

Use E=hc/λ and rearrange. λ = hc/E. E is 3.75 x 10^-19 J so simply plug that in. h and c are constants. you will get wavelength. To convert to angstroms, use 1m=1×10^10 Å.

[Miguel Hernandez LEC 3]

To solve this type of question, you would use the equation E = hv. In this equation E = energy to reject and electron, h is Planck's constant, and v is the frequency. You would also use the equation, c = wavelength/frequency. By rearranging the equation, you should determine wl = hc/energy. You would then plug in the values you've given. (6.626*10^-34)(3*10^8)/3.75*10^-19.