Main target of learning in Spectroscopy

What is the main target of learning in the topic of Spectroscopy as mentioned in the slide?

• To understand the spectrum of visible light

• To explain the relation between emission and absorption lines and describe what we can learn from those lines

• To analyze the different colors in the spectrum

• To study the intensity of light in spectroscopy

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What is a spectroscope?

• A device that combines different frequencies of light into a single beam.

• A device that amplifies light to see distant objects.

• A device that detects the intensity of light.

• A device that splits a beam of radiation into its component frequencies.

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What is the purpose of delivering light split by a spectroscope?

• To combine it back into a single beam.

• To deliver it to a screen or detector for detailed study.

• To increase the intensity of the light before use.

• To transmit it directly through a medium without changes.

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What do many hot objects emit?

• A continuous spectrum of radiation containing light of only a few wavelengths.

• A continuous spectrum of radiation containing light of all wavelengths.

• A discontinuous spectrum of radiation containing light of specific frequencies.

• No radiation at all.

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What does a hot gas produce instead of a continuous spectrum?

• A continuous spectrum of radiation containing light of all wavelengths.

• An emission spectrum consisting of only a few well-defined absorption lines.

• An emission spectrum consisting of only a few well-defined emission lines of specific frequencies or colors.

• A continuous beam of radiation without any specific frequencies or colors.

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What happens when a continuous beam of radiation passes through cool gas?

• It produces a continuous spectrum without any lines.

• It produces emission lines at random frequencies.

• It produces absorption lines at precisely the same frequencies as are present in the gas's emission spectrum.

• It does not interact with the gas at all.

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What are emission lines?

• A full spectrum of light emitted by all atoms.

• Single frequencies emitted by specific atoms.

• The colors visible in a rainbow.

• Patterns formed by the interference of light waves.

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What is the difference between the two diagrams shown?

• One uses a hot bulb and the other uses heated hydrogen gas.

• One shows emission lines and the other shows absorption lines.

• One uses a prism and the other uses a diffraction grating.

• One is for visible light and the other is for ultraviolet light.

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What can an absorption spectrum be used for?

• To determine the chemical composition of a substance

• To measure the temperature of a substance

• To calculate the density of a substance

• To identify the age of a substance

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What is depicted in the image as an example of an emission spectrum?

• Hydrogen

• Helium

• Sodium

• Oxygen

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