I know I tried to use Google and Yahoo with no help but the only web page I have is for the textbook itself (Cutnell, Johnson: Physics, 6th Edition). I have the right answer for my homework but I was just trying to figure out how. I guess I really wanted to know. LOL...
The electron in a hydrogen atom is in the first excited state, when the electron acquires an additional 2.86 eV of energy. What is the quantum number n of the state into which the electron moves?
I found the answer to be 5 but I don't know how. I thought I could use the following equation...
Thank you.
I didn't realize I could find KE by using .5 *mv^2 and use the mass of an electron. Once I did that I added WF and then divied hc by my answer. The answer I got was 1.82e-7 m and that was correct.
Thank you again for the help. I knew I was thinkging too hard and not looking...
Light is incident on the surface of metallic sodium, whose work function is 2.3 eV. The maximum speed of the photoelectrons emitted by the surface is 1.26e6 m/s. What is the wavelength of the light?
I first converted Work Function to Joules:
2.3eV x (1.6e-19 J / 1eV) = 3.68e-19 J
The...
Thank you! It had to be in meters so it took 4.804e-3 meters! I am glad it was an easy fix. I thought I had a grasp of this concept and I was frustrated when I couldn't get the correct answer.
Thank you again!
Hello! I am stuck on a problem that seems so easy. The question is:
Two slits are 0.143 mm apart. A mixture of red light (wavelength = 665 nm) and yellow-green light (wavelength = 565 nm) falls on the slits. A flat observation screen is located 2.29 m away. What is the distance on the...