PROPAGAÇÃO RETILÍNEA DA LUZ - ECLIPSES SOLAR E LUNAR
Autor: Wild Lago | Publicado: 2012-04-06T07:58:00-07:00


LEIA TAMBÉM:
CONCEITOS BÁSICOS DE ÓPTICA&nbsp;
CONCEITOS BÁSICOS DE ÓPTICA II&nbsp;
PRINCÍPIOS DA ÓPTICA GEOMÉTRICA


Lei da
Propagação Retilínea da luz:

“Nos meios homogêneos e transparentes a luz se
propaga em linha reta”.

&nbsp;

Uma das aplicações da propagação retilínea da da luz é a ocorrência de eclipses solares e lunares. Veja esses fenômenos abaixo.&nbsp; 


ECLIPSES:



SOLAR:

É o alinhamento perfeito entre o Sol, a Lua e a Terra, onde a
Lua projeta a sua sombra na superfície da Terra.&nbsp;

&nbsp; &nbsp;

&nbsp;




 
 
  
  
  
  
  
  
  
  
  
  
  
  
 
 
 

 


Na região de sombra o observador&nbsp; vê o eclipse total.

&nbsp; 

Na região de penumbra o observador vê o eclipse parcial.

 

Na região iluminada não vê o eclipse.

&nbsp;

A lua e o sol aparecem num mesmo plano.&nbsp; &nbsp;



&nbsp;lunar:

É o alinhamento perfeito entre o Sol, a Terra e
a Lua, onde a Terra projeta a sua sombra na superfície da Lua.&nbsp;

 


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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; câmara escura:

É uma caixa de paredes opacas munida de um orifício em uma de
suas faces. A imagem projetada no interior da caixa é menor e invertida. São exemplos de câmara escura as máquinas fotográficas, o olho humano.




 
 
  
  
  
  
  
  
  
  
  
  
  
  
 
 
 

 

 


&nbsp;

Onde :



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