Mathematical ReasoningHard
Question
A pulse of light of duration 100 ns is absorbed completely by a small object initially at rest. Power of the pulse is 30 mW and the speed of light is 3 × 108 ms-1. The final momentum of the object is :-
Options
A.0.3 × 10-17 kg ms-1
B.1.0 × 10-17 kg ms-1
C.3.0 × 10-17 kg ms-1
D.9.0 × 10-17 kg ms-1
Solution
Energy incident = P (time)
= 30 mW (100 ns)
= 3 × 10-9
So momentum
10-17 kg m/sec.Create a free account to view solution
View Solution FreeMore Mathematical Reasoning Questions
If A = , then which one of the following statements is not correct ?...In a certain town, 25% of the families own a phone and 15% own a car; 65% families own neither a phone nor a car and 2,0...The contrapositive of the statement ″If it is raining, then I will not come″, is :...A particle of mass m is projected from the ground with an initial speed u0 at an angle α with the horizontal. At th...In an LCR circuit as shown below both switches are open initially. Now switch S1 is closed, S2 kept open, (q is charge o...