Unit E | Topic 3.1-3.2 | Telescopes, spectrum's, and parallax

Question 1

Who made one of the first telescopes?

Answer 1

Hans Lippershey

Question 2

Who was the scientist famous for his work with the telescope?

Answer 2

Galileo

Question 3

Definition of:
Refracting telescope

Answer 3

A device that uses 2 lenses to gather and focus light into a focal point

Question 4

What 2 kinds of lenses does a refracting telescope use?

Answer 4

• Objective lens
• Ocular lens

Question 5

Definition of:
Reflecting telescope

Answer 5

A device that uses a concave mirror to gather and focus light into a focal point

Question 6

What are some problems with using telescopes to observe and study space from earth?

Answer 6

Clouds, humidity, and pollution can all interfere with the quality of images a telescope can view

Question 7

Definition of:
Electromagnetic energy

Answer 7

Forms of radiated energy that travel at the speed of light, but have different wavelengths and frequencies as light

Question 8

How do radio telescopes work?

Answer 8

Radio telescopes use incoming signals that are used to map out the composition and distribution of matter in space

Question 9

Definition of:
Parallax

Answer 9

The apparent shift in position of a nearby object when the object is viewed from two different places

Question 10

Definition of:
Spectoscopy

Answer 10

The study of spectra produced when a beam of light is passed through a prism

Question 11

Definition of:
Spectroscope

Answer 11

A device that can be used to determine the chemical composition of stars

Question 12

What is the Doppler Effect?

Answer 12

The apparent change in frequency of waves as the observer and the source move

Question 13

If a galaxy has a red tint to it, is it moving away or towards earth?

Answer 13

Away

Question 14

True or False:
The Doppler Effect only applies to light and sound waves

Answer 14

False:
The Doppler effect applies to all EM waves