What is the wavelength in nanometers of the photon
Course:- Physics
Reference No.:- EM13795761

Assignment Help
Assignment Help >> Physics

Q1. The energy levels of a certain atom have the following pattern:

E1= -340eV (n = 1),

E2 = -85 eV (n = 2),

E3 = -37.78eV (n = 3), and so on..

An electron drops from n=3 to n=1 in this atom. What is the wavelength in nanometers of the photon emitted in the process? Planck's constant h = 6.626 x 10-34 Joule-sec, 1eV = 1.6 x 10-19 Joules.

Q2. How Many photons per second come out of a ruby laser that is giving out 2 milliwatts of power? (1 watt = 1 Joule/sec and 1 eV = 1.6 x 10-19 Joules). Look up the for what wavelength a ruby laser produces.

Q3. You have three liquids: ethyl alcohol, chloroform and ice-cold Water. When you mix 100 grams of ethyl alcohol at a temperature of T=25 Celsius with 200 grams of ice-cold water (T= 0C), the resulting mixture has a temperature of 5.55 C. When you mix 200 grams of ethyl alcohol at a temperature of T=25 Celsius with 100 grams of chloroform at T=10 C, the resulting mixture has a temperature of 22.22 C. What is the final temperature when you mix 150 grams of ethyl alcohol at T=15 C with 250 grams of chloroform at T=5 C? (You are given that the specific heat capacity at water is 4.2 J/g.K).

Put your comment

Ask Question & Get Answers from Experts
Browse some more (Physics) Materials
Select all that apply. Which of the following can be explained by colliding worlds in the early solar system? A. Mercury's large metallic core B. Venus's slow, backward rotati
Two 0.40kg soccer balls collide elastically in a head-on collision. The first ball starts at rest, and the second ball has a velocity of 3.5 m/s. What is the final velocity
A large fake cookie sliding on a horizontal surface is attached toone end of a horizontal spring with springconstant k = 440 N/m; What will be the kinetic energy of the cooki
Red was not going to let go easily, so she pulled on the handle with a force of 12 N. If the net force on the basket is straight up, at what angle was Red Riding Hood pullin
You want to determine the speed of the blocks immediately before they hit the ground. You may assume that the blocks lose no energy due to friction with the table or by air
A satellite of mass M = 229 kilogram is in circular orbit around the earth at an altitude equivalent to the earth's mean radius (6370 kilometer). Evaluate what is the satell
A sledge loaded with bricks has a total mass of 17.7 kg and is pulled at constant speed by a rope inclined at 20.9° above the horizontal. What is the mechanical energy lost
The coefficient of kinetic friction for a 22 kilogram bobsled on a track is 0.10. Find what force is required to push it down a 6.0 degree incline and achieve a speed of 60