Understanding Light and Shadows

The video explains that light always travels in a straight line, which is demonstrated through an experiment using straight and bent pipes. When looking through a straight pipe, the flame of a candle is visible, but it is not visible through a bent pipe, illustrating that light does not bend around curves. This principle is crucial for understanding how shadows are formed, as light does not curve around objects, leading to shadow creation.

What is the fundamental property of light discussed in the video?

• Light always travels in a curved path.

• Light travels in a straight line.

• Light can bend around objects.

• Light changes color when it hits an object.

In the experiment, what happens when you look at a candle flame through a straight pipe?

• The flame appears distorted.

• The flame changes color.

• You see the flame clearly.

• You cannot see the flame.

Why can't you see the flame through a bent pipe?

• The light is blocked by the opaque part of the pipe.

• The light changes direction.

• The pipe is too long.

• The flame is too dim.

What does the experiment with different bent pipes demonstrate?

• Light travels faster through bent pipes.

• Light changes color when it bends.

• Light can bend around curves.

• Light does not bend and always travels in a straight line.

What is the conclusion about the path of light from the experiment?

• Light always travels in a straight line.

• Light changes speed when it bends.

• Light travels in a zigzag pattern.

• Light can bend around objects.

What happens when an opaque object is placed in the path of light?

• The light passes through the object.

• It blocks the light, creating a shadow.

• The light changes color.

• The light bends around the object.

How does the straight-line path of light contribute to shadow formation?

• The light is blocked by the object, creating a shadow.

• The light bends around the object, creating a shadow.

• The light passes through the object, creating a shadow.

• The light changes direction, creating a shadow.

What is the main reason light does not curve around objects?

• Light travels in a straight line.

• Light is too weak to bend.

• Objects are too opaque.

• Light changes speed when it hits an object.