The Sun Review

What does a prism do?

• combines the many colors of visible light into white light by bending each wavelength at a different angle

• separates sunlight into ultraviolet and infrared radiation

• separates visible light into its many colors by bending each wavelength at a different angle

• changes the wavelength of electromagnetic radiation that passes through it

Which of the following types of visible light has the longest wavelength?

• red

• green

• violet

• blue

A star’s spectrum can tell astronomers

• how big the star is.

• the star’s chemical composition.

• the age of the star.

• how far away the star is from Earth.

Which type of spectrum does the radiation from most stars produce?

• absorption spectrum

• emission spectrum

• discontinuous spectrum

• continuous spectrum

What does the use of the Doppler effect tell astronomers about a star?

• a star’s exact velocity as it moves in the galaxy

• the chemical composition of the star

• its diameter compared to that of the sun

• whether a star is moving toward or away from Earth

A typical incandescent light bulb produces a(n)

• emission spectrum.

• discontinuous spectrum.

• continuous spectrum.

• absorption spectrum.

What does a refracting telescope use to produce an image?

• a mirror

• a spectroscope

• a prism

• a lens

Why is chromatic aberration a problem for astronomers?

• It blocks stars from most telescopes.

• It weakens the images of stars.

• It makes stars appear much larger than they are.

• It makes images of stars appear sideways.

What does a reflecting telescope use to produce an image?

• a mirror

• a spectroscope

• a prism

• a lens

Which of the following statements is NOT true of most large optical telescopes?

• They are refracting telescopes.

• They have greater light-gathering power.

• They have greater resolving power.

• They are reflecting telescopes.