Chapitre 2.1 Flashcards

1
Q

Miroir concave: infiniment loi du miroir

A

Tache lumineuse au foyer , car rayon incident parallèle

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2
Q

Miroir convexe

A

Pour toutes les positions:
Virtuelle, droite, + petite, derrière miroir (entre s et F)
Position image sera au prolongement des rayons réfléchis

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3
Q

Miroir concave : avant C

A

Réelle, inversée, + petite, entre C et F

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4
Q

Miroir concave : sur C

A

Réelle, inversée, même grandeur, à C

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5
Q

Miroir concave : entre C et F

A

Réelle, inversée, + grande, avant C

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6
Q

Miroir concave : à F

A

Pas d’image car rf //

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7
Q

Miroir concave : entre F et S

A

Virtuelle, droite, + grande, derrière miroir

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8
Q

Position image pour avant C, sur C et C-F

A

Sera au croisement des rayons réfléchis

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9
Q

Entre F et S position image

A

Sera au croisement des prolongements des rayons réfléchis

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10
Q

Formule des miroirs

A

1/f=1/di+1/do

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11
Q

Grandissement formule

A

g= hi/ho = -di/do = -f/ (do-f)= (f-di)/f

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12
Q

Image réelle 3 plus grande et 3 fois plus petite

A

G= -3 g= -1/3 moins

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13
Q

Image virtuelle 3 fois plus grande et 3 fois plus petite

A

G= 3 g= 1/3

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14
Q

F si signe positif et négatif

A

+; miroir concave
-; miroir convexe

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15
Q

di positive et negative

A

+; image réelle
-; image virtuelle

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16
Q

Hi + et -

A

+; image droite
-; image inversée

17
Q

G positif et négatif

A

+ virtuelle
- réelle