Question

Across
4. A convex lens is ___ lens
6. An image which can be obtained on a screen
Down
1. A concave lens is ____ lens
2. An image which cannot be obtained on a screen
3. Any polished or a shining surface acts as a ____
5. One of the rainbows colours​

Answer 1

Across

4. a convex lens is biconvex lens.

6. an image which can be obtained on a screen is called a real image.

Down