+1-415-670-9189
info@expertsmind.com
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
 
Minimize


Ask Question & Get Answers from Experts
Browse some more (Physics) Materials
Two relativistic rockets move toward each other. As seen by an observer on earth, rocket A, of proper length 500m, travels with a speed of .8c while rocket B, of proper leng
A 30 Newton box is pulled upward 6 meter along the surface of a ramp that rises at 37 degree above the horizontal. Obtain how much work does gravity do on the box during thi
It is well known that bullets and other missiles fired at Superman simply bounce off his chest. Suppose that a gangster sprays Superman's chest with 6 g bullets at the rate of
A man is applying a horizontal force in trying to push a 25 kilogram block up a frictionless plane inclined at an angle of 15o. Find the force needed just to keep the block in
A hockey puck on a frozen pond is given an initial speed of 23.0 m/s. If the puck always remains on the ice and slides 122 m before coming to rest. Determine the coefficient
A 5.0micrometer strand of DNA carries +e charge per nm of length. Treating it as a charged line, what's the electric field strength 28 nanometer from the DNA, not near eithe
A string under a tension of 58.5 N is used to whirl a rock in a horizontal circle of radius 2.75 m at a speed of 20.5 m/s on a frictionless surface, What is the breaking str
Steam can cause more serious burns than water at the same temperature. Here we want to examine this effect quantitatively, noting that flesh becomes badly damaged when its t