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Atomic Physics

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Which of the following is absorbed by the ozone layer?


All components of the electromagnetic spectrum in vacuum have the same


A. The wavelength of microwaves is greater than that of UV-rays.

B. The wavelength of IR rays is lesser than that of UV-rays.

C. The wavelength of microwaves is lesser than that of IR rays.

D. Gamma rays have shortest wavelength in the electromagnetic spectrum.

Of the above statements


Solar radiation is

Q. An electron with kinetic energy 5 eV is incident on a hydrogen atom in its ground state. The collision?

5eV electron cannot excite a hydrogen atom Hence collision is elastic.

Q. what is the difference between thomson and rutherford model?

Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup." Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus.

Q. Wherever hydrogen atom emits a photon in Balmer series?

n = 2 to n = 1 transition will take place

Q. what is braggs equation?

Bragg Equation. Because electrons have wave properties they can be diffracted by crystals. Electrons will be diffracted when the angle of incidence, θ on a crystal plane satisfies the Bragg Equation: nλ = 2 d sin θ where λ is the wavelength of the electrons, d is the spacing of the crystal planes and n is an integer.

Q. The frequency and intensity of a light source are both doubled. Consider the following statements. (i) The saturation photocurrent remains almost the same. (ii) The maximum kinetic energy of the photoelectrons is doubled.?

Saturation currect doubles and maximum k.e. increases but no doubles.