How does intensity of spectral lines vary with wavelength?

Intensity of spectral lines depends on the wavelength which has an inverse relation with the frequency of that particular spectral line. Hence, a wave which has greater frequency will have lower wavelength and a higher intensity.

Which spectral line is more intense?

red
The light emitted by hydrogen atoms is red because, of its four characteristic lines, the most intense line in its spectrum is in the red portion of the visible spectrum, at 656 nm.

What is intensity of spectral lines?

The intensity of spectral lines is determined by the relative probabilities transitions between various energy levels. Selection rules for rotational Raman allow only J=�2. Q4. 1 The intrinsic probability for a transition of a single molecule from J = 0 to J = 2 is the same as that for a transition from J = 1 to J = 3.

Are all line spectra the same?

Each element produces a unique set of spectral lines. Since no two elements emit the same spectral lines, elements can be identified by their line spectrum.

What are the factors influencing the intensity of spectral lines?

The intensity of lines on the spectrum will be affected by the amount of sample which light passes through. The intensity of this transmitted light depends on the sample concentration and path length.

Why do some spectral lines appear more intense and bright than other lines in a line spectra?

In hydrogen spectrum,some spectral lines are brighter than others depending upon their energy level. When electron jumps from some higher orbit,the energy released in the from of photon will be greater,and we get a brighter line. Thus in hydrogen spectrum some lines are brighter than others.

Why do different elements have different spectral lines?

Different elements radiate at different frequencies in the electromagnetic spectrum because their electron shells set them apart from all other elements and photons are emitted from an electron when it makes a transition from a higher to a lower energy state.

Are all spectral lines of equal intensity Why?

THE BRIGHTNESS OR INTENSITY OF SPECTRAL LINES DEPENDS UPON THE NUMBER OF PHOTONS OF SAME WAVELENTH OR FREQUENCY ABSORBED OR EMITTED. The emission of e will takes place only when the frequency of incident is equal or greater than the minimum energy required for the emission of e(threshold frequency).

How do you find the intensity of a spectral line?

The intensity in a series of lines is In = hvNnAm where N n is the number of atoms per cubic centimeter in the nth state, and An is the rate of radiation per atom.

What do you understand by width and intensity of spectral lines?

Such a frequency or wavelength range is called the width of spectral lines. The frequency range between points where the intensity falls to half the maximum intensity is taken as the width of a spectral line. Hence, the width of a spectral line is often referred to as the half-width of a spectral line.

Why do spectral lines have different brightness?

Explanation: The thickness (brightness) depends on the number of photons. When there is more frequency, there is more energy so it emits more photons.

Why do all elements not have the same spectral lines?

Why are there no spectral lines at frequencies that do not transition?

Thus no lines are observed at frequencies that do not correspond to a transition between two energy states – since no absorption can occur at these frequencies, the intensity of a spectral line at this frequency is zero, i.e. no line is observed. Three different contributors to the transitions between states were identified by Einstein:

What is the relationship between frequency and intensity of spectral lines?

The intensity of a spectral line at a given frequency is related to the net rate of absorption (or emission) at that frequency. The third process which occurs is totally independent of the intensity or frequency of any radiation that is present.

What is the relationship between spectral lines and Doppler shift?

The spectral lines of a specific element or molecule at rest in a laboratory always occur at the same wavelengths. For this reason, we are able to identify which element or molecule is causing the spectral lines. If the emitter or absorber is in motion, however, the position of the spectral lines will be Doppler shifted along the spectrum.

What are the characteristics of grating spectroscopy?

Important characteristics of grating spectra: 1) Spectra of different orders are situated symmetrically on both sides of zero order. 2) Spectral lines are almost straight and quite sharp. 3) Spectral colours are in the order from Violet to Red. 4) Spectral lines are more dispersed as we go to higher orders.