+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
A steam pipe weighting 50 lb/ft that passes between two buildings 60 ft apart and is supported by a system of cables as shown, assuming that the weight of the cable is equiv
Michael Phelps won a gold medal at the 2008 Beijiing olympics by swimming the 200 meter medley in 1:54:80. On an off-day Mike swims the medley in 1:58:32. What is the speed
A cylindrical capacitor has an outer conductor with a radius of 3.5 mm and an inner conductor with a radius of 2.1 mm. The two conductors are separated by vacuum and the entir
A 16 kg child slides down a 3.1 m-high playground slide. She starts from rest, and her speed at the bottom is 2.4 m/s. What is the change in the thermal energy of the slide
The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, a cheetah starts from rest and runs 49 m in a straight line, Determine the
Another scheme to catch the roadrunner has failed! Now a safe falls from rest from the top of a 27.0 m high cliff toward Wile E. How long does he have to get out of the way
What is the (a) “current” due to the electron orbiting in a circular path about the proton in a hydrogen atom? Take the orbital radius to be r = 0.0529 nm.] (b) What magneti
How old are the rocks brought back from the Moon? What is the Moon's orbital period? What is its rotation period? Why does the Moon rise 50 minutes later each day? What is t