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Electromagnetic Radiation

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Questions and Answers

How does an electromagnetic wave begin?

When an electrically charged particle vibrates (correct)
When an electric field touches an object
When a magnetic field starts vibrating
When a charged particle loses energy

Which fields combine to create an electromagnetic wave?

Magnetic and mechanical fields
Electric and sound fields
Electromagnetic and gravitational fields
Electric and magnetic fields (correct)

What is the most important source of electromagnetic waves on Earth?

The moon
Jupiter
The sun (correct)
Mars

Which type of electromagnetic waves have the shortest wavelengths and highest frequencies?

X rays (B) Signup and view all the answers

What happens when electromagnetic waves strike matter?

They may be reflected, refracted, or diffracted (D) Signup and view all the answers

What is the full range of electromagnetic radiation called?

Electromagnetic Spectrum (C) Signup and view all the answers

What is the main characteristic of electromagnetic waves?

They consist of vibrating electric and magnetic fields. (A) Signup and view all the answers

How is the transfer of energy by electromagnetic waves described?

Electromagnetic radiation (D) Signup and view all the answers

What is the function of a magnetic field around a magnet?

Exert force on objects without touching them (D) Signup and view all the answers

What is the purpose of the electric field surrounding a charged particle?

An area of electrical force (C) Signup and view all the answers

How do microwaves transfer energy inside a microwave oven?

Through the air inside the oven to the food (A) Signup and view all the answers

What can you observe when placing iron objects near a magnet?

Objects move toward the magnet (B) Signup and view all the answers