# P1.1 Visible light and the solar system Flashcards Preview

## Physics core edexcel > P1.1 Visible light and the solar system > Flashcards

Flashcards in P1.1 Visible light and the solar system Deck (19)
1
Q

Who came up with the idea of a geocentric model?

A

Ptolemy

2
Q

Who came up with the idea of a heliocentric model?

A

Nicholaus Copernicus

3
Q

What does geocentric mean?

A

Earth centred

4
Q

What does heliocentric mean?

A

Sun centred

5
Q

What do luminous objects in space give out?

A

Visible light

6
Q

What does visible light travel as?

A

Waves

7
Q

What does interface mean?

A

Boundary

8
Q

What is refraction?

A

The change in direction when a light ray moves into a different material

9
Q

Where does refraction happen?

A

Between the interface of two materials

10
Q

What is the normal line?

A

The line at right angles to the surface of a mirror or lens when a ray of light hits it

11
Q

What is another name for a converging lens?

A

A convex lens

12
Q

What is the focal length of a lens?

A

This distance between the focus and the lens

13
Q

How can you find the focal length of a converging lens?

A

By focusing the image of a distant object onto a piece of paper and measuring the distance between the lens and the paper

14
Q

What does the eyepiece lens in a refracting telescope do?

A

Magnify the image created by the objective lens

15
Q

What does a refractive telescope consist of?

A
• a tube
• an objective lens
• an eyepiece lens
16
Q

Why does refraction occur?

A

Because light travels at different speeds in different materials

17
Q

What happens when a ray of light enters a denser material?

A

It slows down and refracts towards the normal

18
Q

What happens when a ray of light leaves a dense material?

A

It speeds up and refracts away from the normal

19
Q

What does the magnification of converging lenses depend on?

A
• how curved their surfaces are

- how close together they are placed