JEE Main2014ChemistryStructure of AtomActual
Based on the equation: E =-2.0 10⁻¹⁸ ~J ( 1 n ₂^2 - 1 n ₁^2 ) the wavelength of the light that must be absorbed to excite hydrogen electron from level n=1 to level n =2 will be: ( h =6.625 10⁻³⁴ Js , C =3 10^8 ~ms ⁻¹ )
Options
- A1.325 10⁻⁷ ~m
- B1.325 10⁻¹⁰ ~m
- C2.650 10⁻⁷ ~m
- D5.300 10⁻¹⁰ ~m
Correct answer
A. 1.325 10⁻⁷ ~m
Step-by-step solution
aligned & E=-2.0 10⁻¹⁸ ( 1 2^2 - 1 1^2 ) &=-2.0 10⁻¹⁸ -3 4 &=1.5 10⁻¹⁸ & E= h c & = h c E = 6.6 10⁻³⁴ 3 10^8 1.5 10⁻¹⁸ &=1.325 10⁻⁷ ~m aligned