The ray passing through the focus of the lens, after refraction
a) remains undeviated
b) emerges parallel to principal axis
c) also passes through optical centre
d) none of these

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Solution

when the ray passes from the focus then after refraction it will become parallel to pricipal axis. option b

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The ray passing through the focus of the lens, after refraction a) remains undeviated b) emerges parallel to principal axis c) also passes through optical centre d) none of these

when the ray passes from the focus then after refraction it will become parallel to pricipal axis. option b

The ray passing through the focus of the lens, after refraction
a) remains undeviated
b) emerges parallel to principal axis
c) also passes through optical centre
d) none of these