What Is Light?

Important Vocabulary Words From The Video


Photons are tiny particles that make up light. They are tiny enough to travel through the gaps between atoms in matter.

  • The light is composed of photons.
  • The photons that make up light are photons.

A nanometer is a billionth of a meter. This means that a nanometer is about the size of a grain of sand.

  • The drug is designed to work at a distance of one nanometer.
  • The nanometer is the smallest unit of distance that light can travel.

To be baffling is to be very confusing. When you are baffling, it's hard to understand what you are supposed to do.

  • The instructions were so baffling, no one could understand them.
  • The mystery novel was so baffling, I couldn't put it down.

To propagate is to spread something (usually a plant or a virus) from one place to another. When you propagate a plant, you move the plant from one place to another and then plant it.

  • The plant will not propagate if you water it with the wrong kind of water.
  • The virus will not propagate if you don't add water to the container.

To interact is to have a conversation with someone. You might interact with your friends on social media, or you might interact with a customer on the phone.

  • She only interacts with her friends on social media, and she never interacts with strangers.
  • He always interacts with his customers on the phone, and he loves talking to them.

To elevate something is to make it more important or prestigious than it is. often, this is done by giving it a title or by making it a part of a larger project.

  • He elevated the issue of the budget by adding it to the agenda for the meeting.
  • The promotion was elevated to a cabinet level position.

Oscillating means moving back and forth between two extremes. It can be something as simple as the temperature in a room oscillating between cold and hot, or it can be more complex, like the stock market oscillating between high and low.

  • The market oscillated between high and low throughout the day.
  • The temperature in the room oscillated between cold and hot throughout the day.

behaves is a word that is used to describe the way that someone behaves. It is often used when talking about people who are not behaving in a normal way.

  • He behaves very strangely, and I'm not sure why.
  • She was behaving strangely all day, and I couldn't figure out why.

Permeating means to spread throughout. When a substance permeates something, it reaches all the way through.

  • The oil permeated the water, preventing it from sinking.
  • The smell of the perfume permeated the room.