An Absorption spectra is always a   …………………a.Line Spectra     b.Band Spectra c.Continuous spectra    d.All of the above

Break Down the Problem

1. Identify the Type of Spectra: Understand what absorption spectra are and how they differ from emission and continuous spectra.
2. Consider Each Option: Analyze whether absorption spectra can be classified as line spectra, band spectra, continuous spectra, or all of the above.

Relevant Concepts

1. Absorption Spectra: This refers to the spectrum of absorbed light, which shows dark lines or bands at specific wavelengths where light has been absorbed by the substance.
2. Line Spectra: Produced when light is emitted or absorbed by individual electrons transitioning between specific energy levels.
3. Band Spectra: Involves the absorption or emission of light in broader bands due to molecular transitions.
4. Continuous Spectra: Emitted by solid, liquid, or densely packed gases and shows a smooth range of colors without lines.

Analysis and Detail

1. Is Absorption Spectra Line Spectra?: Yes, they show dark lines corresponding to the wavelengths absorbed, indicative of line spectra.
2. Is Absorption Spectra Band Spectra?: Yes, for molecules that absorb over ranges of wavelengths (bands), absorption spectra can also be band spectra.
3. Is Absorption Spectra Continuous Spectra?: No, absorption spectra are not continuous; they consist of specific absorption features.

Verify and Summarize

Considering the definitions and characteristics, absorption spectra can be classified as both line and band spectra but not as continuous spectra. Therefore, "All of the above" cannot be the right choice.

Final Answer

The correct answer is b. Band Spectra because absorption spectra can include features from both line and band spectra but do not manifest continuous spectra.