Unit 2 Light and Astro Test

Front

What is spectroscopy?

Back

A scientific technique used to determine the composition of stars by analyzing the light they emit.

Front

What balances the outward pressure caused by nuclear fusion in a star?

Back

Gravity pulls all the mass in toward the center, balancing the outward pressure.

Front

What can be inferred about a distant galaxy that is moving away from us?

Back

It indicates that the universe is expanding.

Front

What is white light?

Back

A combination of all the colors in the visible region of the electromagnetic spectrum.

Front

How do radio waves compare to visible light in terms of wavelength?

Back

Radio waves have longer wavelengths than visible light.

Front

What is the speed of radio waves compared to visible light?

Back

Both travel at the same speed in a vacuum.

Front

What is the electromagnetic spectrum?

Back

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

Front

What is nuclear fusion?

Back

The process by which two atomic nuclei combine to form a heavier nucleus, releasing energy.

Front

What role does gravity play in the life cycle of a star?

Back

It helps to maintain the star's structure by balancing the outward pressure from nuclear fusion.

Front

What is the significance of the Doppler effect in astronomy?

Back

It helps determine whether an object in space is moving toward or away from us based on the change in frequency of its light.