Question

Explain persistence of vision with the help of an activity.

Tell with ACTIVITY​

Answer 1

Answer:

  Persistence of Vision

Your eye and brain can hold on to a series of images long enough to form a single complete picture.

When you look through a narrow slit, you can see only a thin strip of the world around you. But if you move the slit around rapidly, your eye and brain combine these thin strips to make a single complete picture.

Tools and Materials

1. Utility or X-Acto knife
2. Cardboard mailing tube about 3 inches (8 cm) in diameter and 2 to 3 feet (60 to 90 cm) long
3. A cap for the tube or black paper and tape
4. Ruler and pencil

Assembly

1. If your mailing tube has a cap, use the pencil and ruler to mark a rectangle that is 1 inch (2.5 cm) long and 1/8 inch (3 mm) wide. Use your utility knife to cut out a slit the size of the rectangle. Replace the cap on the end of the tube.
2. Alternatively, tape two small pieces of black paper to one end of the tube so that there is a 1/8 inch (3 mm) slit between them.

To Do and Notice

Close one eye. Cup your hand around the tube to make a cushion between the tube and your eye and prevent light from leaking in. Put your open eye to the open end of the tube. Hold the tube so that the slit is vertical.

When the slit is stationary, you can’t see much. Keep your head and body still and sweep the far end of the tube back and forth slowly while you look through it. (Make sure the area around you is clear.) Increase the scanning speed and compare the views. Notice that when you sweep the tube quickly from side to side, you can see a remarkably clear view of your surroundings.

HOPE IT HEPLS