Question

The path of the laser beam became visible when the powder was sprinkled. This is because जब पाउडर छिड़का गया तो लेसर बीम का पथ दिखने लगा। ऐसा इसलिए हुआ क्यूँकि​

Answer 1

The path of the laser beam became visible when the powder was sprinkled. This is because of the scattering of the laser beam light.

• Laser stands for 'light amplification by stimulated emission of radiation'.  
• Laser light is such a beam of light that has the same phase, frequency, as well as direction.
• When the powder is sprinkled, the particles present in the powder will remain in suspension.  
• These particles in suspension will scatter the laser beam causing the scattered light to enter the eye.
• In this way, the past of the laser beam becomes visible when the powder is sprinkled.