Shadow and Light

How does the size of a shadow change with distance?

• The size of a shadow is not affected by distance.

• The size of a shadow increases with distance.

• The size of a shadow decreases with distance.

• The size of a shadow remains constant with distance.

Answer explanation

The size of a shadow decreases with distance as the light rays spread out, causing the shadow to appear smaller.

In which direction does a shadow point?

• In a random direction

• Straight down

• Opposite direction of the light source

• Towards the light source

Answer explanation

A shadow points in the opposite direction of the light source, as it is cast by an object blocking the light rays from reaching a certain area.

Define the term 'ray' in the context of shadows.

• A ray is a curved line that bends in multiple directions.

• A ray is a line that has a fixed endpoint.

• A ray is a straight line that originates from a point and extends infinitely in one direction.

• A ray is a shadow cast by a circular object.

Answer explanation

A ray is a straight line that originates from a point and extends infinitely in one direction.

What is the difference between a core shadow and a light shadow?

• Core shadow is the shadow cast by the object itself, while light shadow is cast by external light sources.

• Core shadow and light shadow are the same thing.

• The core shadow is the darkest part of a shadow, while the light shadow is less intense.

• The core shadow is the lightest part of a shadow, while the light shadow is the darkest.

Answer explanation

The core shadow is the darkest part of a shadow, while the light shadow is less intense. This highlights the correct choice.

How does the position of the light source affect the shadow?

• The position of the light source has no impact on the shadow

• The shadow becomes brighter as the light source moves closer

• The shadow disappears when the light source moves

• The position of the light source affects the length and direction of the shadow.

Answer explanation

The position of the light source affects the length and direction of the shadow.

What happens to the shadow of an object when it is closer to the light source?

• The shadow splits into multiple shadows.

• The shadow disappears completely.

• The shadow becomes larger and less defined.

• The shadow becomes smaller and more defined.

Answer explanation

When an object is closer to the light source, its shadow becomes smaller and more defined due to the proximity of the object to the light source.

How does the color of an object affect the shadow it casts?

• The color of an object has no impact on the shadow.

• Dark-colored objects cast darker shadows than light-colored objects.

• Light-colored objects cast darker shadows than dark-colored objects.

• The shadow color matches the object's color.

Answer explanation

Dark-colored objects cast darker shadows than light-colored objects because darker colors absorb more light, resulting in less light being reflected to create a shadow.

What is the role of the size of the light source in determining the shadow's sharpness?

• The shadow is sharper with a larger light source.

• The shadow is sharper with a smaller light source.

• The size of the light source has no effect on the shadow's sharpness.

• The shadow's sharpness is determined by the distance between the light source and the object.

Answer explanation

The shadow is sharper with a smaller light source.

Behind a burning candle is a photo.

In which of the images is the shadow correctly depicted.

• A

• B

• C

Answer explanation

The shadow in image A correctly depicts the burning candle, as it shows the light source and the photo behind it in the correct orientation.

In a house, there are 2 table lamps by a window. In the evening, the lamps are turned on. Which of the images correctly shows the light shining outside?

• A

• B

• C

• D

Answer explanation

The correct choice is D because it shows the light shining outside from the lamps in the evening.