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calculate the wavelength of radiation which excites the electron of hydrogen atom from ground state to forth energy level. Ionisation energy of hydrogen atom is 1312 kJ/mol

calculate the wavelength of radiation which excites the electron of hydrogen atom from ground state to forth energy level. Ionisation energy of hydrogen atom is 1312 kJ/mol

Grade:11

1 Answers

Umakant biswal
5349 Points
7 years ago
@ siddharth 
I will give you the approach on how to solve the problem , rest u have to calculate the value . 
frst of all can u recall the formula ?? 
deltaE=-RH(1/nf square – 1/ni square ) 
apply that formula , 
and find out Rh , that is rydberg constant . 
in thaat case take the value nf = infinity and ni = 1
once u get the value of rh then put that in the below equation 
hV = – Rh(1/nf square – 1/ ni square ) 
that means u have to equate this value with hv . 
and then find lambda which is the wavelength 
take nf = 4 and ni = 1 , in the 2nd case . 
apply the formula for wavelength 
v = c/lamba. 
HOPE IT CLEARS YOUR DOUBT 
ALL THE BEST ..
 

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