IGCSE O Level Physics MCQs - Chapter 1

Electromagnetic Waves Quiz Questions and Answers PDF - 3

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The Quiz: When the medium of electromagnetic waves changes from air to water, their speed; "Electromagnetic Waves" App Download iOS & Android (Free) with answers remains same, increases, decreases and may increase or decrease to learn online courses. Study electromagnetic waves quiz questions, download Amazon eBook (Free Sample) for GRE prep classes.

Electromagnetic Waves Questions & Answers PDF Download: MCQ Quiz 3

MCQ 11: When the medium of electromagnetic waves changes from air to water, their speed

A) increases

B) remains same

C) decreases

D) may increase or decrease

MCQ 12: Faster among the waves and rays is

A) waves

B) both have no speed

C) rays

D) both have equal speed

MCQ 13: Electromagnetic waves obey the law of

A) refraction only

B) reflection and refraction both

C) reflection only

D) momentum

MCQ 14: Speed of electromagnetic waves in vacuum is

A) 30 × 10⁸ m s^-1

B) 4 × 10⁸ m s^-1

C) 3.0 × 10⁸ m s^-1

D) 6.0 × 10⁸ m s^-1

MCQ 15: As the speed decreases if we change the medium of electromagnetic waves from air to water, the frequency

A) also decreases

B) also increases

C) remains same

D) may increase or decrease

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