Atomic Spectra
According to the Bohr model of an atom, the electron in an atom moves around a nucleus in fixed orbits with specific energies known as energy levels. The orbital energies are quantized. The electrons remain in these energy levels until they emit or absorb a photon of a particular wavelength, the quantum of energy. If the electron emits a photon, it then falls back to a lower energy level, and if it absorbs a photon, the electron rises to higher energy levels. The photons released or absorbed in these transitions of an electron are studied and analyzed on a screen as atomic spectra.
Ruby Lasers
Lasers are devices that emit light using atoms or molecules at a certain wavelength and amplify the light to produce a narrow beam of radiation. It works as per the principle of electromagnetic radiation. Their source of emission contains the same frequency and same phase. It was invented in the year 1960 by the great noble scientist, Theodore Maiman.
Balmer Series
The spectrum of frequency observed when electromagnetic radiation is emitted from an atom when it goes from higher energy state to lower state, is known as emission spectrum. This transition occurs when an excited electron moves from higher to lower state. It has many possible electron transitions and each transition has a specific energy difference.
Emission Spectrum
Every state of matter tries to be at minimum potential energy or it can be said that the atoms of element/ substance arrange themselves such that overall energy is minimum.
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6.
Which of the following statements is true?
The frequency of the x-ray remains constant, since frequency does not
change once EMR leaves the source, but the photon energy changes.
The frequency of the x-ray increases, but its photon energy decreases.
The frequency and the energy of the x-ray decrease after the collision.
Both the frequency and the photon energy remain the same after the
collision.
7. The wavelength of the deflected x-ray photon is
pm.
(Record your three-digit answer in the numerical-response section below.)
Your answer:
000
Use the following information to answer the next question
Electromagnetic Wave
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6.
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Use the following information to answer the next two questions
A 4.40 pm x-ray is incident on a stationary electron. The scattered photon has its
path altered perpendicular to its original direction.
Compton scattering
Incident
photon
MAMA
λ₁
Target
electron
at rest
mima
Which of the following statements is true?
Recoil
electron
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