Question

which material cannot be used to make a lens? ​

Answer 1

Answer:

clay

Glass and water are transparent materials. There is a certain amount of plastic that is transparent so that the plastic can be used to make a lens, but the clay is an opaque substance so that the light can not be transmitted into it and the clay can not be used to create the lens.

Answer 2

Answer:

We know that water and glass are transparent material. Therefore, they can be used to form the lens.

There is some plastic that is transparent so the plastic can be used to make a lens but the clay is a opaque material so the light can't transmit through it so clay can't be used for making the lens.

hope helps.....