Podcast
Play an AI-generated podcast conversation about this lesson
Questions and Answers
Which one of the following is a key difference between a bulb and a laser?
Which one of the following is a key difference between a bulb and a laser?
- Bulbs emit light in a single wavelength, while lasers emit light in multiple wavelengths.
- Bulbs emit coherent light, while lasers emit incoherent light.
- Bulbs emit light through incandescence, while lasers emit light through stimulated emission. (correct)
- Bulbs emit light in a straight line, while lasers emit light in a scattered pattern.
Which of the following accurately describes the light produced by a bulb?
Which of the following accurately describes the light produced by a bulb?
- The light emitted by a bulb is monochromatic and incoherent.
- The light emitted by a bulb is polychromatic and coherent.
- The light emitted by a bulb is polychromatic and incoherent. (correct)
- The light emitted by a bulb is monochromatic and coherent.
What is the main application of lasers?
What is the main application of lasers?
- Cutting and welding materials (correct)
- Illuminating a photograph
- Decorative lighting
- Lighting up a room
