Using Light: Concave Mirrors

The video explains the properties and applications of concave mirrors. It starts with a simple example of seeing one's reflection in a spoon, which acts as a concave mirror. The video then describes how concave mirrors are used in telescopes to gather light from distant objects in space. It explains the principle of light reflection, where parallel light rays are focused at a point, and vice versa. Finally, the video discusses the use of concave mirrors in car headlights and flashlights to create strong, focused beams of light.

What is a concave mirror?

• A mirror with a zigzag surface

• A mirror with an inward curve

• A mirror with an outward curve

• A mirror with a flat surface

How do concave mirrors help in telescopes?

• They scatter light in all directions

• They absorb light completely

• They focus parallel light rays to a single point

• They change the color of light

What happens to light rays when they are reflected from a concave mirror positioned at its focal point?

• They change their color

• They diverge in different directions

• They become parallel to each other

• They are absorbed by the mirror

In what way are concave mirrors used in car headlights?

• To scatter light in all directions

• To form a powerful, focused beam of light

• To absorb light

• To change the color of the light

What is the role of a concave mirror in a flashlight?

• To scatter light

• To absorb light

• To form a strong, focused beam of light

• To change the light's color