waves

desigonzalez · #1 Dec 3, 2004, 07:51 PM

How many photons of red light of wavelength 700nm do you need to get at least as much energy as one of blue light with wavelength 301nm?

urmod4u · Dec 5, 2004, 02:27 PM

700/301 times. That is 3 photons ("at least" - more than two, less than three) - because a photon cannot be cut into pieces.
E=h*v
h is Planck's constant, v is the frequency (this is not the letter v but the Greek letter "nu").
The frequency is the speed (of light) divided by the wavelength.



At Ask Me Help Desk you can ask questions in any topic and have them answered for free by our experts. To ask questions or participate in answering them you must register for a free account. By registering you will be able to: Get free answers from experts in any of our 300+ topics. Accept money for answers that you provide. Communicate privately with other members (PM). See fewer ads. Sign Up!