Lesson 3 — 6.2 + 6.3

Period 4 — Light

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Light 6.1 + 6.2Middelbare schoolhavo, vwoLeerjaar 2

This lesson contains 26 slides, with text slides and 2 videos.

Items in this lesson

Period 4 — Light

Slide 1 - Slide

This lesson

Recap — 6.2
Studying 6.3
Discussing 6.3

Slide 2 - Slide

Goals

Name the speed of light and it's name in physics
Explain how the speed of light us used as a unit of distance
Explain how astronomers use light to study space
Be able to do calculations using the speed of light

Slide 3 - Slide

During classical explanation – have a question, raise your hand

While working independently – disturb the class, go to olc 2 for the rest of the lesson with extra work

Not participating serious in the class (making noise, inappropriate jokes, etc.) — go to olc 2 with extra work

After one warning — If you stand out one more time, go to olc 2 with extra work

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Science —The coming weeks

Next week — Discussing the test + finishing up to and including paragraph 6.3

The week after that — electro magnetism practical + paragraph 6.4

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Recap

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6.2 Seeing things

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Types of light

Emitted light
Reflected light
Transmitted light
Absorbed light

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Transparant

Translucent

Opaque

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Slide 13 - Video

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Studying 6.3

Study §6.3

Write down the key concepts

Write down any questions you have or parts you don't understand

Make the yellow block and workbook exercises for §6.3

(an aeroplane travels at a speed of 900 km/h)

Slide 17 - Slide

The speed of light

300 000 000 m/s
this is called 'c'

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Light — as a distance unit

Light seconds
light minutes
light hours
light years (ly)

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Exercise

The closest star to our sun is Proxima Centauri. This star is 40,208,000,000,000 km away from our sun.

The speed of light is 300 000 000 meters per second

How many light years away is Proxima Centauri from our sun?

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Slide 23 - Slide

The speed of light = 300 000 000 m/s — called 'c' in physics.

Light is used as a measure of distance (light years).

Astronomy studies the universe through the information in the light that reachers earth.

to measure the speed of light, technology had to invented that measures time in small enough intervals to be able to detect it.

calculations using the speed of light

Slide 24 - Slide