Can we see in the dark?
Many of us think we can see in the dark because there is always some light around us. Light from a clock, television or streetlights.
What you will need.
A reading book
A dark room.
What to do.
Take your reading book and torch into the cupboard. Do not switch on the torch! Close the door and try to read your book.
Switch the torches on one at a time. Does it become easier to read your book?
Can your eyes see without a light switched on?