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Questions and Answers
Which of the following is true about light?
Which of the following is true about light?
- It is a form of heat energy with no wavelength
- It is a form of mechanical waves with wavelength (100 – 10,000 nm)
- It is a form of sound waves with no wavelength
- It is a form of electromagnetic waves with wavelength (100 – 10,000 nm) (correct)
What does the acronym LASER stand for?
What does the acronym LASER stand for?
- Light: Electromagnetic radiation that can produce visual sensation (correct)
- Amplify: To decrease in size, volume or significance
- Stimulate: To calm, reduce or suppress something
- Emission: A flowing forth, such as the absorption of electrons by parent atoms
What are photons?
What are photons?
- Light waves with no mass and no energy
- Particles with mass and no energy
- Massive particles with no energy according to their wavelength
- Massless 'energy packets' with certain amount of energy according to their wavelength (correct)
What does radiation refer to in the context of LASER?
What does radiation refer to in the context of LASER?
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How is a laser different from ordinary light beam?
How is a laser different from ordinary light beam?
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