A small ball is projected with initial speed 
and at an angle 
with horizontal from ground. The de-Broglie wavelength of ball at the moment its velocity vector becomes perpendicular to initial velocity vector is -
Text Solution
Verified by ExpertsThe correct answer is:
C
If the velocity vector of the projectile at time 
is perpendicular to its initial velocity vector, the dot product of the velocity vectors at these two instants is zero.
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