Question

mention 2 important phrnomenon of light

Answer 1

photoelectric current refraction reflection

Answer 2

the phenomenos of light are:-

1. Reflection         
       Nd                  --------- these two r major
2. Refraction 

Other phenomenons include

Mirage - optical phenomenon ( refraction - cause)
Rainbow - optical phenomenon(refraction)
Halo - optical phenomenon
Aurora
Zodiacal light
Sun dog - bright spots of sunlight in the sky
Anthelion
Light pillar
Alexander band
After glow
Earths shadow
Etc.........


Diffraction and interference are also light phenomenons..

Hope it helps

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