What is the momentum of X −rays having wavelength 0.001nm?
Correct answer: A. 6.63 × 10−22 kg m s−1
- A. 6.63 × 10−22 kg m s−1
- B. 6.63 × 10−27 kg m s−1
- C. 6.63 × 10−31 kg m s−1
- D. 6.63 × 10−34 kg m s−1
Explanation
We know that,λ= h / pp=6.26×10 −22 kgm/s
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Dawn of Modern Physics
Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
Practise Dawn of Modern Physics
739 free Dawn of Modern Physics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Dawn of Modern Physics questions
If we use a light of photons having energy 2.4 eV then the stopping potential required will be:
When light has exactly the same energy as the work done function of a metal surface then:
The de Broglie wavelength of a particle of mass 1 gram and velocity 100 ms-1 is:
The maximum energy of the electrons released in photocell is independent of:
Which of the following will be a better shield against 𝛾-rays?
The transverse nature of light is shown by