Lasers simplified

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What does LASER stand for?

Light Amplification by Stimulated Emission of Radiation (correct)
Light Absorption by Spontaneous Emission of Radiation
Light Amplification by Spontaneous Emission of Radiation
Light Absorption by Stimulated Emission of Radiation

What does LASER stand for?

Light Amplification by Stimulated Emission of Radiation (correct)
Light Absorption by Spontaneous Emission of Radiation
Light Amplification by Spontaneous Emission of Radiation
Light Absorption by Stimulated Emission of Radiation

What are the three main features of LASER light?

Multichromatic, coherent, and collimated
Monochromatic, diffused, and collimated
Multichromatic, diffused, and collimated
Monochromatic, coherent, and collimated (correct)

What are the three main features of LASER light?

Monochromatic, coherent, and collimated (D) Signup and view all the answers

What does monochromatic mean in the context of LASER light?

Only light of a single wavelength is produced (B) Signup and view all the answers

What does monochromatic mean in the context of LASER light?

Only light of a single wavelength is produced (B) Signup and view all the answers

What does coherent mean in the context of LASER light?

All photons have the same phase, producing a high-intensity beam (D) Signup and view all the answers

What does coherent mean in the context of LASER light?

All photons have the same phase, producing a high-intensity beam (D) Signup and view all the answers

What does collimated mean in the context of LASER light?

LASER light has a narrow, powerful ray (A) Signup and view all the answers

What does collimated mean in the context of LASER light?

LASER light has a narrow, powerful ray (A) Signup and view all the answers

What is population inversion in the context of LASER light?

When the number of electrons at the excited state becomes larger than those at the ground state (B) Signup and view all the answers

What is population inversion in the context of LASER light?

When the number of electrons at the excited state becomes larger than those at the ground state (B) Signup and view all the answers

What is the role of electron states in creating LASER light?

Electrons absorb energy and move to an excited state, then they fall to an intermediate metastable state (B) Signup and view all the answers

What is the role of electron states in creating LASER light?

Electrons absorb energy and move to an excited state, then they fall to an intermediate metastable state (B) Signup and view all the answers

Why are fluorescence measurements more challenging than absorbance measurements?

The detection of emitted photons at lower energy is not always easy (B) Signup and view all the answers

Why are fluorescence measurements more challenging than absorbance measurements?

The detection of emitted photons at lower energy is not always easy (B) Signup and view all the answers

Why have researchers adopted the use of LASER sources for better excitation-emission in cell biology and medical imaging research?

It ensures that the number of electrons returning from the metastable state to the ground state is higher than those that are transiting from the ground state to the metastable state, allowing for easier detection (C) Signup and view all the answers

Why have researchers adopted the use of LASER sources for better excitation-emission in cell biology and medical imaging research?

It ensures that the number of electrons returning from the metastable state to the ground state is higher than those that are transiting from the ground state to the metastable state, allowing for easier detection (C) Signup and view all the answers