Question

One can sense colours only in
bright light.​

Answer 1

Answer:

The cells present on the retain and responsible for colour vision are known as cone cells. These cells become active only under bright light and remain inactive under dark. Thus, we are able sense only in bright light.

Answer 2

Answer:

1. A convex lens with small focal length produces a virtual, erect and bigger image of an object, such lens is called a simple microscope.

2. One can get a 20 times larger image of an object using such microscope.

3. Thus, Simple microscope is used for watch repairs.

HOPE THIS WILL HELP YOU.