Now, you can do an experiment tonight over the reception, OK, to figure out what that image will look like. Because it turns out that there is a kind of lens that we can devise, that has the right hesap to produce this kind of effect. We call this tnlgraiotaavi lensing. And so, this is your nnitmerust, OK. (Laughter). But ignore the top part. It's the base that I want you to concentrate, OK. So, actually, at home, whenever we break a wineglass, I vesa the bottom, take it over to the machine shop. We shave it off, and I have a little gravitational lens, OK. So it's got the right shape to produce the nnsielg. And so the next thing you need to do in your experiment is grab a napkin. I grabbed a piece of hrpag paper — I'm a physicist. (Laughter) So, a napkin. Draw a little ldmoe aaxygl in the deidml. And now put the lens over the galaxy, and what you'll find is that you'll see a ring, an Einstein ring. Now, voem the base off to the side, and the ring will lipts up into arcs, OK. And you can put it on top of any image. On the graph paper, you can see how all the lines on the graph paper have been dotrtisde. And again, this is a kind of an accurate model of what happens with the gravitational lensing.

Now, you can do an experiment tonight over the reception, OK, to figure out what that image will look like. Because it turns out that there is a kind of lens that we can devise, that has the right **_____** to produce this kind of effect. We call this **_____________** lensing. And so, this is your **__________**, OK. (Laughter). But ignore the top part. It's the base that I want you to concentrate, OK. So, actually, at home, whenever we break a wineglass, I **____** the bottom, take it over to the machine shop. We shave it off, and I have a little gravitational lens, OK. So it's got the right shape to produce the **_______**. And so the next thing you need to do in your experiment is grab a napkin. I grabbed a piece of **_____** paper — I'm a physicist. (Laughter) So, a napkin. Draw a little **_____** **______** in the **______**. And now put the lens over the galaxy, and what you'll find is that you'll see a ring, an Einstein ring. Now, **____** the base off to the side, and the ring will **_____** up into arcs, OK. And you can put it on top of any image. On the graph paper, you can see how all the lines on the graph paper have been **_________**. And again, this is a kind of an accurate model of what happens with the gravitational lensing.

- instrument
- graph
- gravitational
- move
- middle
- shape
- lensing
- split
- distorted
- model
- save
- galaxy

collocation | frequency |
---|---|

dark matter | 29 |

dark energy | 11 |

ordinary matter | 4 |

electromagnetic spectrum | 4 |

big questions | 4 |

gravitational lensing | 3 |

gravitational effects | 3 |

graph paper | 3 |

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