Question 5: Explain the difference between laser light and light from an incandescent lamp?
Differences between laser light and light from an incandescent lamp are as follow;
|Laser Light||Lamp light|
|Laser light is unidirectional. It moves in one direction.||Light from a lamp is multi-directional. It moves in all directions from the lamp.|
|Laser light has one wavelength.||Light from a bulb has a number of wavelengths.|
|Laser light is phase coherent. This means all radiations have the same phase.||Lamp light is not in phase. Radiations from a lamp light have different phases.|
|Laser light is produced due to stimulated emission.||Lamp light is produced due to spontaneous emission of radiations.|
|Laser light is more intense as they are phase coherent.||Lamp light is comparatively less intense as they are not phase coherent.|