Define the following terms related to light (i) Light year (ii) parallel beam of light rays
(iii) convergent beam of light rays (iv) opaque medium ( v) translucent medium.
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light year is distance traveled by light in a year
parallel beam of light is parallel rays of light in 1 direction
convergent beam is formed by convex lens after refraction
opaque is something u can't see through
translucent means blurry image or only light can enter but to vision
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