Question

Which among the following characteristics of Laser light specifies the precise movement of all individual light waves together through time and space?

• A. Monochromatic
• B. Directional
• C. Coherent
• D. Brightness

Hint:

Laser Properties. Monochromatic (single color/wavelength). Directional (narrow beam). Coherent (waves in phase). Bright (high intensity). Coherence describes the fixed phase relationship between waves.

Answer 1

The Correct Option is C

Characteristics of laser light: - Monochromatic: Consists of essentially a single wavelength or a very narrow range of wavelengths (single color)
- Directional: Travels as a highly collimated, narrow beam with very little divergence
- Coherent: The light waves emitted are in phase with each other, both spatially and temporally
This means the wave crests and troughs align precisely as they travel together through time and space
This phase relationship is crucial for phenomena like interference and holography
- Brightness (High Intensity): Due to directionality and coherence, laser light can deliver high power per unit area
The characteristic described as "precise movement of all individual light waves together through time and space" specifically refers to the phase relationship between the waves, which is coherence