Funny answers.

Q.A glass slab of refractive index is ρ₀sin(x), x is distance from mirror, is kept in front of concave mirror find where the image will be seen by the observer?
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Ans. Light falled on blind spot of observer.

isnt this given in chemistry forum

I want to know what is the source of this and where did you get this and I must say nice pics and please continue to post these kind of interesting things.