Unit 2 Light and Astro Test

Front

What happens to the brightness and lifetime of a star as its mass increases?

Back

As stellar mass increases, brightness increases and lifetime decreases.

Front

What will happen to a light and a bell under a bell jar when all air is removed?

Back

You will see the light, but won't hear the bell.

Front

What is the approximate lifetime of a star with a mass of 15 solar masses?

Back

About 10 million years.

Front

What does white light refer to in terms of the electromagnetic spectrum?

Back

White light is a combination of all the colors in the visible region of the electromagnetic spectrum.

Front

What is the Cosmic Microwave Background Radiation?

Back

It is the remaining energy from the big bang.

Front

Define stellar mass.

Back

The amount of matter contained in a star, typically measured in solar masses.

Front

What is the relationship between a star's mass and its brightness?

Back

Generally, as a star's mass increases, its brightness also increases.

Front

Explain the concept of the electromagnetic spectrum.

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, including visible light, radio waves, and gamma rays.

Front

What is the significance of the Cosmic Microwave Background Radiation in cosmology?

Back

It provides evidence for the Big Bang theory and the early state of the universe.

Front

What happens to sound in a vacuum?

Back

Sound cannot travel in a vacuum because it requires a medium (like air) to propagate.