Question

Multiple Choice Questions
m
The de-Broglie wavelength of 1 mg grain of
sand blown by a wind at the speed of 20 m/s is
[h=6.63 x 10 4 S.I. Unit)
Mar 08]
(A) 33.15 x 10-6 m
(B) 33.15 x 10-33
(C) 33.15 x 10-30m
(D) 33.15 x 1030m

The photoelectric threshold wavelength of
certain metal is 3315 Å. Then its work function
is
[Oct 09]
(A) 6* 10-19 J
(B) 7.286 x 10-19 J
(C) 9 x 10-19
(D) 9.945 x 10-19
​

Answer 1

Answer:

khud krlo yaar smj nhi aa rha ye question hai ya answer