light

Definition

Light is a type of energy that travels in waves. It is the same energy that allows us to see. Light travels from a source, such as a sun or a lightbulb, to our eyes. When light hits our eyes, it is converted into nerve signals that our brains interpret as images.

Light can travel through many different materials, such as air, water, and glass. However, it can also be blocked by some materials, such as walls and trees. The colour of light is determined by its wavelength. Shorter wavelengths of light, such as blue and violet, appear to be bluer, while longer wavelengths of light, such as red and orange, appear to be redder.

How can the word be used?

Bright: Something that emits or reflects a lot of light.

Different forms of the word

Noun:

Light is the form of electromagnetic radiation that is visible to the human eye.
Light is also used to refer to the brightness of something. For example, a light bulb produces light.
Light can also be used to refer to the illumination of something. For example, the sun lights up the sky.

Adjective:

Light is an adjective that describes something that is bright or not heavy. For example, a light jacket is not heavy.
Light can also be used to describe something that is easy or not difficult. For example, a light meal is easy to eat.

Verb:

To light is to make something bright or to set something on fire. For example, to light a candle is to make it bright.
To light can also be used to describe the process of starting something, such as a fire or a car engine. For example, to light a fire is to start it.

Etymology

The word "light" comes from the Old English word "leoht", which also means "light". It was first used in English in the 7th century.

The Old English word "leoht" is thought to be derived from the Proto-Germanic word *leuhtaz, which also means "light".

Question

What is light?