A helium atom and hydrogen molecule are moving with same velocity. Ratio of Debroglie wavelength of helium atom to that of hydrogen molecule will be - Sri Chaitanya Infinity Learn Best Online Courses for NCERT Solutions, CBSE, ICSE, JEE, NEET, Olympiad and Class 6 to 12

A
4 : 1
B
1 : 2
C
2 : 1
D
1 : 4

Solution:

Debroglie equation ;

$λ = \frac{h}{mv};$

‘h’ is a constant and ‘v’ is given as constant for both the particles;

$\frac{λ_{1}}{λ_{2}} = \frac{m_{2}}{m_{1}}; MW of hydrogen = 2 u; Weight of hydrogen molecule = 2 \times 1.66 \times 10^{- 24} g; AW of helium = 4 u; Weight of helium atom = 4 \times 1.66 \times 10^{- 24} g; \frac{λ_{H_{2}}}{λ_{He}} = \frac{m_{He}}{m_{H_{2}}}; \frac{λ_{H_{2}}}{λ_{He}} = \frac{4}{2} = \frac{2}{1};$

Solution:

Related content