Light Sources and Reflecting Surfaces

What is an example of an emitting light source?

• A book

• A tree

• A rock

• An example of an emitting light source is a light bulb.

Name a common reflecting surface.

• Glass

• Mirror

• Brick

• Paper

What is the process of emitting light called?

• The process of emitting light is called 'reflection'.

• The process of emitting light is called 'absorption'.

• The process of emitting light is called 'refraction'.

• The process of emitting light is called 'luminescence'.

Explain how a mirror reflects light.

• A mirror reflects light by the law of reflection, where the angle of incidence is equal to the angle of reflection.

• A mirror reflects light by absorbing it and then emitting it back out

• A mirror reflects light by changing the direction of the light waves

• A mirror reflects light by creating a new light source

Give an example of a natural emitting light source.

• The sun

• A campfire

• A light bulb

• A computer screen

How does a smooth surface reflect light differently from a rough surface?

• A smooth surface reflects light in a chaotic and disorganized manner

• A rough surface reflects light in a regular and organized manner

• A smooth surface reflects light in a regular and organized manner, while a rough surface reflects light in multiple directions due to its irregularities.

• A smooth surface reflects light in multiple directions due to its irregularities

What are the characteristics of an emitting light source?

• Being completely silent

• The characteristics of an emitting light source include producing visible light, having a source of energy, and emitting photons.

• Requiring no energy source

• Reflecting light instead of emitting it

Describe how a prism can separate white light into its different colors.

• A prism separates white light into different colors by reflecting the light at different angles

• A prism separates white light into different colors by absorbing certain wavelengths of light

• A prism can separate white light into its different colors by refracting and dispersing the light due to the different wavelengths of each color.

• A prism separates white light into different colors by emitting its own colored light

What are the properties of a good reflecting surface?

• Transparent, flexible, and porous

• Opaque, rigid, and colorful

• Rough, uneven, and dull

• A good reflecting surface should be smooth, flat, and polished to minimize scattering and maximize reflection.

Explain how a flashlight emits light.

• A flashlight emits light by using a small fire inside the casing

• A flashlight emits light through the conversion of electrical energy into light energy using a bulb or LED. When the switch is turned on, the circuit is completed, allowing the current to flow through the bulb or LED, which then emits light.

• A flashlight emits light by releasing stored sunlight when the switch is turned on

• A flashlight emits light by using a tiny generator to produce light energy