Question

you are provided with a printed piece of paper. using this paper how will you differentiate between a convex lens and concave lens

Answer 1

I will conduct the needle experiment.

Answer 2

What is the difference between convex and concave mirrors and lens ? (1) The reflecting surface of the concave mirror is bulged inwards. But the reflecting surface of the convex mirroris bulged outwards. (2) Concave mirrorproduces real and inverted images (except when the object is placedbetween pole and focus.