Visible Light & Solar System

Question 0

What do waves do at boundaries between materials?

Answer 0

Reflect and refract

Question 1

How do u measure the focal length of a converging lens using a distant object?

Answer 1

1. Hold the lens in front of the screen
2. Point the lens towards a distant object (eg cloud or tree)
3. Adjust the distance of the lens until a sharp image is displayed on the screen
4. Distance between lens and screen is focal length

Question 2

What is refraction?

Answer 2

When the light bends towards or away from the normal

Question 3

What is reflection?

Answer 3

When a wave is bounced off a surface

Question 4

What is frequency by waves?

Answer 4

Number of vibrations per second

Question 5

What is the wavelength?

Answer 5

Distance between wave peaks

Question 6

What is a waves amplitude?

Answer 6

The distance from the rest position to the peak of a wave

Question 7

What is wave speed?

Answer 7

How fast the wave travels m/s

Question 8

What is a transverse wave?

Answer 8

Wave when the vibrations are perpendicular to the direction in which the wave travels

Question 9

What is a longitudinal wave?

Answer 9

The vibrations move in the direction of travel.

Question 10

What waves do earthquakes produce?

Answer 10

Seismic waves
Primary (P)
Secondary (S)

Question 11

What type of waves do earthquakes produce?

Answer 11

Both

Question 12

What type of waves are:

a. Sound
b. Electromagnetic
c. Seismic

Answer 12

a. Longitudinal
b. Transverse
c. Both P= longitudinal
S= transverse

Question 13

Describe the way that waves transfer energy without transferring matter?

Answer 13

The particles vibrate but don’t follow the propagating wave

Question 14

How does the reflecting telescope work?

Answer 14

A concave mirror forms an image of a distant object at its focal point.
The flat mirror reflects the rays of light towards the eyepiece.
The eyepiece magnifies the image.

Question 15

How does a simple (refracting) telescope work?

Answer 15

It has 2 converging lenses
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E͟͟y͟͟e͟͟p͟͟i͟͟e͟͟c͟͟e͟͟- viewed from here and magnifies to produce a virtual image

Question 16

Explain how Galileo’s observations contradicts the geocentric model?

Answer 16

Geocentric model:
Has the Earth at the centre of the universe and everything orbits around it
Heliocentric model:
- moons orbiting Jupiter
- not everything orbits earth therefore the geocentric model is incorrect

Question 17

Who invented the geocentric model?

Answer 17

Ptolemy

Question 18

What planets were known Ptolemy?

Answer 18

Mercury, Venus, Mars, Jupiter, Saturn

Question 19

How Does Uranus discovered?

Answer 19

Telescope

Question 20

How was Pluto discovered?

Answer 20

Photography

Question 21

Order of naming planets

Answer 21

Mercury 
Venus
Earth 
Mars 
--------- asteroid belt
Jupiter 
Saturn
Uranus
Neptune 
---------- kuiper belt
Pluto 

Oort cloud

Question 22

How did scientists use waves to help them understand the solar system?

Answer 22

Visible

Question 23

How did they use waves to find info bout the milky way?

Answer 23

X-rays to view hot young stars

Question 24

Compare methods of observing with:
a) naked eye
b) photography
c)

Answer 24

More accurate images in order A,C,B

And photography keeps the images