In the absorption spectrum, the wavelengths which are absorbed, are missing and they appear as:a)Bright linesb)Light bandsc)Bright bandsd)Dark linesCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Light not absorbed by the sample will, as before, be separated (dispersed) into its component wavelengths (colors) by the prism. The appearance of the spectrum will resemble that obtained without the sample in place, with the exception that those wavelengths which have been absorbed are missing, and will appear as dark lines within the spectrum of colors. If a piece of the photographic film is used instead of the card, the absorption spectrum can be recorded.

Answer

The answer is obvious if the light corresponding to those wavelengths will be absorbed then there will a dark region in place of those wavelengths of light

Answer

A transmission spectrum will have its maximum intensities at wavelengthswhere the absorption is weakest because more light is transmitted through the sample. An absorption spectrum will have its maximum intensities at wavelengths where theabsorption is strongest.

Answer

The wave length is absorbed and thus from the spectrum those wavelengths are missing

Answer

The correct answer is option 'D' - Dark lines.

Absorption spectrum refers to the spectrum of electromagnetic radiation that has passed through a medium and has absorbed certain wavelengths. When white light passes through a sample, certain wavelengths are absorbed by the atoms or molecules present in the sample, resulting in dark lines appearing in the spectrum. These dark lines are also known as absorption lines or Fraunhofer lines.

Explanation:

1. Absorption of specific wavelengths: When white light passes through a sample, certain atoms or molecules in the sample absorb specific wavelengths of light. The absorbed wavelengths correspond to the energy required to excite electrons from lower energy levels to higher energy levels. As a result, these wavelengths are missing from the transmitted light.

2. Dark lines: The missing wavelengths appear as dark lines or bands in the absorption spectrum. These dark lines represent the specific wavelengths that have been absorbed by the sample.

3. Unique pattern: Each element or compound has a unique pattern of absorption lines in its spectrum. This pattern can be used to identify the presence of specific atoms or molecules in a sample. By comparing the dark lines observed in the absorption spectrum to known patterns, scientists can determine the composition of the sample.

4. Spectroscope: To observe the absorption spectrum, a spectroscope is used. A spectroscope is an instrument that separates light into its different wavelengths, allowing the absorption lines to be seen. The dark lines appear in the spectrum as narrow gaps or dark features against a continuous spectrum of colors.

5. Applications: Absorption spectroscopy is widely used in various fields such as chemistry, physics, astronomy, and environmental science. It is used to identify the composition of unknown substances, analyze the concentration of specific molecules, study the properties of atoms and molecules, and even determine the composition of distant stars.

In conclusion, in an absorption spectrum, the wavelengths that are absorbed by a sample appear as dark lines or absorption lines. These dark lines represent the missing wavelengths that have been absorbed by the atoms or molecules in the sample.

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