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Question
Q208) The wavelength associated with a ball of 200 g and moving with a speed of 5 m/hour is of the order of
a) 10
–10
m
b) 10
–20
m
c) 10
–30
m
d) 10
–40
m
SOLUTION
v = 5 m/hour =5/3600 m/s
m =200 g = 0.2 kg
h =6.6× 10
-34
J-s
Use forula
λ = h/p, p=mv
Answer:(c)