Eighteen Point Two

What does the objective lens in a telescope do?

• It magnifies the image that forms at the focal point

• It collects light from distant objects

• It reflects light to form an image

• It is used to view the image directly

What is a focal point?

• The point where the telescope is aimed

• The location where a telescope is most stable

• The point where rays of light pass through a lens or reflect from a mirror come together

• The end of the telescope where the objective lens is located

What is one of the disadvantages of refracting telescopes mentioned in the text?

• They can easily focus images at different distances.

• They can be very large.

• They can cause images to look fuzzy because the lens can bend under its own weight.

• They use mirrors to gather and focus light.

What is the role of the flat mirror in a reflecting telescope?

• It gathers light and focuses it through the telescope.

• It reflects light to the same focal point.

• It reflects light to the eyepiece.

• It bends under its own weight to focus light.

Which of the following is an advantage of reflecting telescopes over refracting telescopes?

• The mirrors can be very large, allowing the telescope to gather a lot of light.

• They focus different colors of light at slightly different distances.

• They use lenses to gather and focus light.

• They can bend under their own weight.

Why do astronomers place telescopes on mountain tops?

• Because the air is thicker

• To avoid light pollution and atmospheric interference

• It is easier to build on mountain tops

• To be closer to the stars

What is the electromagnetic spectrum made up of?

• Only visible light

• Only gamma rays and X-rays

• All kinds of electromagnetic radiation

• Only radio waves and visible light

Tags

NGSS.HS-PS4-4

Which waves have the longest wavelengths in the electromagnetic spectrum?

• Gamma rays

• X-rays

• Visible light

• Radio waves

What does the atmosphere act as in relation to invisible radiation from space?

• A source

• A shield

• A magnifier

• A reflector

Eighteen Point Two

• The atomic number of Argon

• The atomic mass of Argon

• The atomic number of Helium

• The atomic mass of Helium