1
00:00:00,000 --> 00:00:07,000
Hi guys! I am the YouTuber Cristina and we are going to start the unit 5.

2
00:00:07,000 --> 00:00:12,000
This unit is about light and we are going to do magic.

3
00:00:12,000 --> 00:00:16,000
So here we have a coin, here we have a glass.

4
00:00:16,000 --> 00:00:20,000
We are going to leave the coin under the glass.

5
00:00:20,000 --> 00:00:23,000
Can you see the coin under the glass now?

6
00:00:23,000 --> 00:00:26,000
But if we pour water...

7
00:00:30,000 --> 00:00:33,000
Wow! The coin has disappeared!

8
00:00:33,000 --> 00:00:35,000
How is this possible?

9
00:00:35,000 --> 00:00:38,000
We are going to see this in this unit.

10
00:00:38,000 --> 00:00:41,000
But now we are going to do magic again.

11
00:00:42,000 --> 00:00:45,000
Here we have two arrows.

12
00:00:45,000 --> 00:00:51,000
But if we put the arrows behind the glass...

13
00:00:53,000 --> 00:00:58,000
Can you see? The arrow has changed the direction.