|
Preparation:
Open cardboard box (a large shoe box for example) the inside of which
has been pasted with black paper with a hole of approx. 2 x 2 cm in the front
wall; comb, torch, mirror
|
Steps:
The children shine the torch from the outside through the hole and
into the cardboard box, and see and describe the light cone on the black
surface. They hold the comb between the light source and the hole, and can in
this way identify "rays of light" and describe their propagation.
They hold the mirror in the box, and try holding it in different positions.
They recognize that the rays can be directed.
|
|
Scientific Explanation:
Light spreads into an area in a straight line and in rays. It is
reflected by a mirror in the same angle in which it hits the surface.
|
Possible Variation:
If the bottom and the second front wall of the cardboard box are
covered with white paper, the children can draw the rays on the paper and
look at the result with the lights switched on.
The children experiment as to how they can produce a flashing light (similar
to the blue
light of a police car) with the help of the comb.
|
