Telescopes

Chromatic aberrations are:

• all the light rays can not be brought into focus due to the curve of the optics.

• due to refraction in a lens, light comes to a focus in different locations due to color.

• the imperfections in spherical mirrors due to their size.

• The correction necessary for all optics.

CCD stands for:

• charge camera device

• camera coupling digital

• charged coupled device

• charged coupled digital

The Hubble telescope is unique in that:

• It was built in the United States.

• It is in space.

• It is the largest telescope in the world.

• It had a defect in the mirror.

The Hubble telescope has a ________ mirror.

• 1.0 m

• 2.4 m

• 1.0 ft

• 2.4 ft

Telescopes can detect _______ radiation from the sky.

• only visible

• radio and visible

• UV, radio and visible

• All types of

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

Which of the following is not an advantage of using radio telescopes?

• A signal can be received 24 hours a day.

• The radio telescopes have opened a whole new window to the universe.

• The radio waves are abundant and can be readily collected.

• Radio telescopes can be placed anywhere on the earth.

• Radio waves are not really affected by the atmosphere.

____________ mirrors are used to create larger telescopes.

• squares

• triangles

• hexagons

• octagons

Which of the following is not a problem with refractor telescopes?

• Chromatic aberrations

• Absorption of IR and UV radiation

• Large lenses are heavy and they deform under their own weight

• Two surfaces need to be machined and polished which can lead to imperfections in the glass

• It takes a very long time to make a lens

Which of the following does not limit the size of reflector telescopes?

• Cost is high

• It is a slow process to make a mirror

• Imperfections are possible with larger mirrors

• They cool unevenly causing spherical aberrations

• All of the above limit the size of reflector telescopes

Tags

NGSS.HS-ETS1-3

Which is the largest steerable radio telescope?

• Aricebo

• Green Bank

• Russian telescope

• VLA