Question
A body of mass 10$$\,g$$ is moving with a velocity of $$100\,m\,{s^{ - 1}}.$$ The wavelength associated with it is
A.
$$6.626 \times {10^{ - 7}}m$$
B.
$$6.626 \times {10^{ - 34}}m$$
C.
$$6.626 \times {10^{ - 4}}m$$
D.
$$6.626 \times {10^{ - 35}}m$$
Answer :
$$6.626 \times {10^{ - 34}}m$$
Solution :
$$\eqalign{
& \lambda = \frac{h}{{mv}} \cr
& \,\,\,\,\, = \frac{{6.626 \times {{10}^{ - 34}}J\,s}}{{0.01\,kg \times 100\,m\,{s^{ - 1}}}} \cr
& \,\,\,\,\, = 6.626 \times {10^{ - 34}}\,m \cr} $$