sign up I login
 advanced
» win an I-Phone. check i-points

Ask & Discuss Questions with Community & Experts

 Moderation Team
Ask iit jee aieee pet cbse icse state board community Discussion Response Post to: a hydrogen atom at rest undergoes a trasition 4 n=3 to n=1 its recoil speed is
Forum Index -> Modern Physics -> View Full Question like the article? email it to a friend.  
Author Message
[Post New]9 Jan 2008 15:57:25 IST
    Subject: a hydrogen atom at rest undergoes a trasition 4 n=3 to n=1 its recoil speed is
[Up]
master_purav (1343)

Blazing goIITian

Olaaa!! Perrrfect answer. 217  [346 rates]
master_purav's Avatar
total posts: 814    
offline Offline
According to Rydberg's Equation....

Wave Number = 109677 [1 - 1/9] = 109677 *8/9 = 97490

Now momentum of photon = E/c = hc*Wave number/c = h*Wavenumber = 97490*6.67*10^-34 = Sumthin (x)

According to law of conservation of momentum, this would be the momentum of H atom

So recoil speed = x/ Mass of H atom
= x/ Mass of proton + mass of electron
= x / 1837*mass of electron

I hpope its clear......
"If you win, you shall not have to explain and if you lose, you wont be there to explain"
~ Adolph Hitler
 this reply: 7 points  (with 1 Olaaa!! Perrrfect answer.   in 2 votes )   [?]
 
You have to be logged on to rate
  
 

 Aakash Institute IIT/ AIEEE/ Medical Crash Course
Name  
E-mail  
Phone  
Mobile  
** Hurry. Exclusive goIIT Offer. Limited Seats Only!
available in: New Delhi, Amritsar, Bhatinda, Bokaro, Chandigarj, Dehradun, Guwhati, Hyderabad, Indore, Jaipur, Kanpur, Karnal, Kolkata, Kota, Lucknow, Ludhiana, Mumbai, Noida, Patiala, Patna, Pune, Ranchi, Varanasi
Top Offers for goIITians
Correspondence Courses
Brilliant Tutorials
Narayana Institute
Aakash Institute
Classroom/Crash Courses
Aakash-IITJEE : AIEEE
Aakash-IITJEE : DCE
Aakash-IITJEE : MHTCET
Aakash Institute : AIPMT
Online Test Series
Brilliant Tutorials
Narayana Institute
Aakash Institute
Mahesh Tutorials
AMITY      Sri Chaitanya