Unit 2 Light and Astro Test

Front

What determines the lifetime of a star?

Back

The mass of the star determines its lifetime.

Front

What is the movement of distant galaxies relative to us?

Back

Distant galaxies are generally moving away from us.

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 radio waves and visible light travel at the same speed in a vacuum.

Front

What type of electromagnetic radiation do cell phone cameras detect?

Back

Cell phone cameras detect visible light.

Front

What is the relationship between pitch and frequency in sound?

Back

Lower pitch sounds correspond to lower frequencies.

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation.

Front

What is the difference between reflection and refraction of light?

Back

Reflection is the bouncing back of light, while refraction is the bending of light as it passes through different mediums.

Front

What is the Doppler effect?

Back

The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source.

Front

What is the significance of the color of a star?

Back

The color of a star indicates its temperature; blue stars are hotter than red stars.