Chapter 21 - Section 1 - Telescopes

Question 1

telescope

Answer 1

A device built to observe distant objects by making them appear closer.

Question 2

electromagnetic radiation

Answer 2

Energy that travels through space in the form of waves.

Question 3

visible light

Answer 3

Electromagnetic radiation that can be seen with the unaided eye.

Question 4

wavelength

Answer 4

The distance between the crest of one wave and the crest of the next wave.

Question 5

spectrum

Answer 5

The range of wavelengths of electromagnetic waves.

Question 6

Which of the following is not a type of electromagnetic wave?

• radio wave
• visible light
• X-ray
• sound

Answer 6

sound

Question 7

optical telescope

Answer 7

A telescope that uses lenses or mirrors to collect and focus visible light.

Question 8

refracting telescope

Answer 8

A telescope that uses a convex lens to gather and focus light.

Question 9

convex lens

Answer 9

A piece of transparent glass curved so that the middle is thicker than the edges.

Question 10

reflecting telescope

Answer 10

A telescope that uses a curved mirror to collect and focus light.

Question 11

radio telescope

Answer 11

A device used to detect radio waves from objects in space.

Question 12

Who built the first reflecting telescope?

• Galileo
• Karl Jansky
• Isaac Newton
• Hubble

Answer 12

Isaac Newton

Question 13

What is an observatory?

• a piece of transparent glass
• a structure that contains one or more telescopes
• a range of different colors with different wavelengths

Answer 13

a structure that contains one ore more telescopes