3 - Atomic Physics Questions Answers

Physics >> Modern Physics >> Atomic Physics IIT JEE

A point source of light is placed at the centre of curvature

of a hemispherical surface. The radius of curvature is r

and the inner surface is completely reflecting. Find the

force on the hemisphere due to the light falling on it if

the source emits a power W.

Asked By: ANKIT SHARMA

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Physics >> Modern Physics >> Atomic Physics Others

Consider an electron trapped in an infinite well whose width is 98.5 pm. If it is in a state with n = 15, what are (i) its energy? (ii) the uncertainty in its momentum? (iii) the uncertainty in its position?

Asked By: ANKIT SONI

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Joshi sir comment

$L e t w i d t h = b F o r n t h s t a t e n \frac{λ}{2} = b \Rightarrow λ = \frac{2 b}{n} N o w E = \frac{p^{2}}{2 m} = \frac{{(\frac{h}{λ})}^{2}}{2 m} S o l v e a f t e r p u t t i n g t h e v a l u e o f λ U n c e r ta i n t y i n p o s i t i o n = b N o w u s e ∆ p . ∆ x = n h / 2 π for finding uncertainty in momentum$

Physics >> Modern Physics >> Atomic Physics Board Exam

a toy car of mass 500g travels with a uniform velocity of 25m/s for 5 seconds, the brakes are then applied and the car is uniformly retarded and comes to rest in further 10s calculate the retardation

Asked By: SARABJEET

is this question helpfull: 4 0 submit your answer

Joshi sir comment

use v = u + at

u = 25, v = 0 and t = 10

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