Shadow Length and Direction Experiment

The video tutorial demonstrates an experiment to observe how shadows change direction and length throughout the day. Using a plain paper marked with cardinal directions and a light source simulating the sun, the experiment tracks shadow changes at specific times: 8 a.m., 10 a.m., 12 p.m., 2 p.m., and 4 p.m. The findings reveal that shadows are longest in the early morning and late afternoon, and shortest at noon when the sun is overhead. The direction of the shadow is always opposite to the light source.

What is the first step in setting up the shadow experiment?

• Drawing lines on a plain paper

• Choosing a light source

• Marking the shadow length

• Turning off the lights

What is the purpose of marking points at equal distances from the center on the paper?

• To balance the paper

• To show the direction of the sun

• To indicate the time of day

• To measure the shadow length

Which object is used to simulate the sun in the experiment?

• A candle

• A mobile flashlight

• A torch

• A desk lamp

What is the direction of the shadow relative to the light source?

• Random direction

• Perpendicular to the light source

• Opposite to the light source

• Same direction as the light source

Why is it necessary to turn off the lights during the experiment?

• To save electricity

• To create a dark environment

• To ensure the flashlight is the only light source

• To make the room cooler

At what time is the shadow expected to be the shortest?

• 4 p.m.

• 12 p.m.

• 10 a.m.

• 8 a.m.

What is the significance of the sun being directly overhead at noon?

• It creates the shortest shadow

• It creates the longest shadow

• It creates a moving shadow

• It creates no shadow

At what times are the shadows observed to be the longest?

• 8 a.m. and 4 p.m.

• 8 a.m. and 12 p.m.

• 10 a.m. and 2 p.m.

• 12 p.m. and 2 p.m.

What is the main conclusion about the direction of the shadow?

• It is always towards the light source

• It changes randomly

• It is always to the north

• It is always opposite to the light source

What is the key learning about shadow length at different times of the day?

• It is shortest in the morning

• It is longest at noon

• It is shortest in the evening

• It is longest in the morning and evening