Light Waves Test Review

Front

What is light energy?

Back

Light energy is a form of energy that travels in waves and can be seen by the human eye. It is responsible for the illumination of our surroundings.

Front

How does light affect materials?

Back

Light can transfer energy to materials, causing changes such as heating, color change, or even chemical reactions.

Front

What is ultraviolet (UV) light?

Back

Ultraviolet light is a type of electromagnetic radiation that has a shorter wavelength than visible light and can carry more energy.

Front

Why do some materials glow under UV light?

Back

Some materials can absorb UV light and re-emit it as visible light, causing them to glow.

Front

What is infrared (IR) light?

Back

Infrared light is a type of electromagnetic radiation with a longer wavelength than visible light, often associated with heat.

Front

How does sunlight differ from light from a desk lamp?

Back

Sunlight contains a broader spectrum of light, including UV and IR, while a desk lamp typically emits only visible light.

Front

What is the role of energy absorption in color change?

Back

When materials absorb specific wavelengths of light, they can change color based on the energy absorbed and the wavelengths reflected.

Front

What is a photochemical reaction?

Back

A photochemical reaction is a chemical reaction that is initiated by the absorption of light energy.

Front

What is the visible spectrum?

Back

The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye, ranging from red to violet.

Front

What is the principle of energy transfer in light?

Back

Light transfers energy to objects it interacts with, which can lead to changes in temperature, state, or chemical composition.