
Exercices chiffrés - ondes électromagnétiques
Authored by Laurence Lannoy
Physics
12th Grade
Used 1+ times

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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
On appelle longueur d'onde λ une onde de frequence f et de vitesse de propagation v. Quelle est la formule qui relie ces trois paramètres ?
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
A quelle autre valeur correspond une fréquence de 1,2 MHz ?
1 200 GHz
1 200 Hz
1 200 000 Hz
1 200 kHz
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Sachant que v = 300 000 km/s, la longueur d'onde de l'onde radio de frequence f = 108 Hz est:
0,3 m
3 m
30 m
300 m
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Une onde électromagnétique a une longueur d’onde de 250nm. Calculez sa fréquence.
1,2×1015Hz
12×1015Hz
1.2 x 1015 Hz
1,2×1014Hz
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Un appareil médical utilise des rayons X de fréquence 3×1018 Hz. Quelle est leur longueur d'onde ?
0,1 m
0,1 nm
0,1 μm
1 nm
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Une onde a une longueur d’onde de 100 μm. Quelle est sa fréquence et à quel domaine appartient-elle ?
3×1012Hz, domaine : infrarouge.
3×1013Hz, domaine : micro-ondes.
30×1012Hz, domaine : infrarouge.
3×1014Hz, domaine : lumière visible.
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