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BLACKBOARD PRESENTATION

Famiglia

Created on July 17, 2024

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Transcript

LE ONDEGRAVITAZIONALI

Start

Introduzione

Il 14 settembre 2015 due antenne gravitazionali del progetto LIGO-Virgo posizionate sulle due coste degli Stati Uniti hanno captato per la prima volta un'onda gravitazionale.

1. Le onde

indice

7. Galileo, Newton, Einstein

2. ...

8. Previsione e scoperta

3. ...

9. Interferometri

4. ...

10. Interferometri spaziali

5. ...

11. ...

6. ..La teoria della relatività generale.

12. ....

Le onde

  • Caratteristiche
  • Cosa sono
  • Onde meccaniche
  • Onde trasversali
  • Onde longitudinali
  • Onde periodiche e armoniche
  • A cosa servono

Il 14 settembre 2015 due antenne gravitazionali del progetto LIGO-Virgo posizionate sulle due coste degli Stati Uniti hanno captato per la prima volta un'onda gravitazionale originata dalla collisione di due buchi neri di massa 29 e 36 volte più grande di quella del sole e si erano fusi in un unico buco nero di 62 masse solari.

Author's Name

L'evento: GW 150914

Il 14 settembre 2015 due antenne gravitazionali del progetto LIGO-Virgo posizionate sulle due coste degli Stati Uniti hanno captato per la prima volta un'onda gravitazionale originata dalla collisione di due buchi neri Una massa circa tre volte quella del sole era stata completamente convertita in energia e irraggiata sotto forma di onde gravitazionali che, propagandosi nell'universo alla velocità della luce, raggiunsero la Terra oltre un miliardo di anni più tardi.

Missione LISA: InterferometrI spaziali

Limiti delle onde elettromagnetiche

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Strumenti di conoscenza: Organi di senso

Udito

Olfatto

Vista

Gusto

Tatto

Strumenti di conoscenza:Le onde elettromagnetiche

Strumenti di conoscenza: particelle dallo spazio

step 04

step 03

Neutrini

raggi cosmici

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Strumenti di conoscenza: Onde elettromagnetiche

La tecnologia radar (a microonde) viene spesso utilizzata per rilevare la presenza o il movimento di oggetti o persone

Onde radio

Un radiotelescopio non osserva la luce visibile ma le onde radio emesse dalle varie radiosorgenti sparse nell'Universo

Immagine nell'infrarosso delle Pleiadi fatta dal telescopio spaziale Spitzer della Nasa

Strumenti di conoscenzA: Onde elettromagnetiche

step 04

step 03

step 02

step 01

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Vedere l'invisibile: Una questione di dimensioni

Telescopio

Microscopio ottico

All'infinitamente piccolo:Nel XVII secolo furono introdotti i primi sistemi di lenti per ingrandire gli oggetti. Tra i primi ad individuarne le potenzialità: Antoni van Leeuwenhoek e Robert Hooke (1635-1703) che osservò dal sughero le celle......

Dall'infinitamente grande:Galileo Galilei nel 1609 punta un "sistema di lenti", già noto alla sua epoca, verso il cielo

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1861

1886

Maxwell prevede le onde elettromagnetiche

1915

Hertz produce e rileva le onde gravitazionali

Albert Einstein prevede le onde gravitazionali (Teoria della relatività generale)

14 sett 2015

Evento GW150914

11 feb 2016

Viene dato l'annuncio

1950

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1960

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1970

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Dicembre 2015

Viene inviato nello spazio il satellite Liza ......

Interferometri

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60%

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80%

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Limiti di indagine mediante le onde elettromagnetiche o le particelle

La luce viaggia più rapidamente di qualunque altro segnale e la radiazione luminosa ha tantissime potenzialità di manifestarsi. Raggi cosmici e i neutrini raggiungono la Terra portando con loro informazioni. ma esiste una parte dell'Universo irragiungibile con questi metodi di indagine. Infatti sia la luce sia le particelle nel loro viaggio possono trovare qualche cosa che le arresta e le assorba e che ci impedisce di raggiungere i confini dell'Universo.

Esiste un viaggiatore che senza limiti, che si muove alla velocità della luce e che nessuno può fermare? Che viaggi ai confini del tempo e dello spazio raggiungibili con la velocià della luce? (L'idea visionaria di Einstein)

Immagine del Sole daL radiotelescopio ALMA (deserto di Atacama in Cile)

La prima immagine ad infrarossi dal telescopio James Webb è la più profonda e nitida mai scattata finora dell'Universo (NASA 2022) ritrae un gruppo di galassie formatesi 13 miliardi di anni fa, subito dopo il Big Bang

Caratteristiche

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Ligo

  • Collocazione: Hanford (Seattle)

Virgo

  • Collocazione: Pisa

Ligo 2

  • acollocazione: Livingstone (New Orleans)

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  • Make sure your audience remembers the message.

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With Genially templates, you can include visual resources to wow your audience. You can also highlight a particular sentence or piece of information so that it sticks in your audience’s minds, or even embed external content to surprise them: Whatever you like! Do you need more reasons to create dynamic content? No problem! 90% of the information we assimilate is received through sight and, what’s more, we retain 42% more information when the content moves.

  • Generate experiences with your content.
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  • Make sure your audience remembers the message.

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  • Generate experiences with your content.
  • It’s got the Wow effect. Very Wow.
  • Make sure your audience remembers the message.

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With Genially templates, you can include visual resources to wow your audience. You can also highlight a particular sentence or piece of information so that it sticks in your audience’s minds, or even embed external content to surprise them: Whatever you like! Do you need more reasons to create dynamic content? No problem! 90% of the information we assimilate is received through sight and, what’s more, we retain 42% more information when the content moves.

  • Generate experiences with your content.
  • It’s got the Wow effect. Very Wow.
  • Make sure your audience remembers the message.

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Let the communication flow!

With Genially templates, you can include visual resources to wow your audience. You can also highlight a particular sentence or piece of information so that it sticks in your audience’s minds, or even embed external content to surprise them: Whatever you like! Do you need more reasons to create dynamic content? No problem! 90% of the information we assimilate is received through sight and, what’s more, we retain 42% more information when the content moves.

  • Generate experiences with your content.
  • It’s got the Wow effect. Very Wow.
  • Make sure your audience remembers the message.

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Let the communication flow!

With Genially templates, you can include visual resources to wow your audience. You can also highlight a particular sentence or piece of information so that it sticks in your audience’s minds, or even embed external content to surprise them: Whatever you like! Do you need more reasons to create dynamic content? No problem! 90% of the information we assimilate is received through sight and, what’s more, we retain 42% more information when the content moves.

  • Generate experiences with your content.
  • It’s got the Wow effect. Very Wow.
  • Make sure your audience remembers the message.

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Let the communication flow!

With Genially templates, you can include visual resources to wow your audience. You can also highlight a particular sentence or piece of information so that it sticks in your audience’s minds, or even embed external content to surprise them: Whatever you like! Do you need more reasons to create dynamic content? No problem! 90% of the information we assimilate is received through sight and, what’s more, we retain 42% more information when the content moves.

  • Generate experiences with your content.
  • It’s got the Wow effect. Very Wow.
  • Make sure your audience remembers the message.

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Let the communication flow!

With Genially templates, you can include visual resources to wow your audience. You can also highlight a particular sentence or piece of information so that it sticks in your audience’s minds, or even embed external content to surprise them: Whatever you like! Do you need more reasons to create dynamic content? No problem! 90% of the information we assimilate is received through sight and, what’s more, we retain 42% more information when the content moves.

  • Generate experiences with your content.
  • It’s got the Wow effect. Very Wow.
  • Make sure your audience remembers the message.

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Let the communication flow!

With Genially templates, you can include visual resources to wow your audience. You can also highlight a particular sentence or piece of information so that it sticks in your audience’s minds, or even embed external content to surprise them: Whatever you like! Do you need more reasons to create dynamic content? No problem! 90% of the information we assimilate is received through sight and, what’s more, we retain 42% more information when the content moves.

  • Generate experiences with your content.
  • It’s got the Wow effect. Very Wow.
  • Make sure your audience remembers the message.