Electromagnetism

During what century did the initial discussions of electricity come into play, which later led to electromagnetic radiation discoveries?

• 17th century

• 18th century

• 19th century

• 20th century

Which scientist proposed to combine the concept of electromagnetism as a unified theory?

• James Clerk Maxwell

• Jean-Jacques Ampère

• Sir Isaac Newton

• Georg Ohm

Can Electromagnetic Radiation travel in an empty space?

• Yes

• No

• Only in the area that contains gravity

• Depending on the geographic location

What are the three characteristics of electromagnetic radiation wave travelling?

• Top, bottom, space

• Hertz, joule, meter

• Amplitude, wavelength, frequency

• Energy, force, momentum

There are more than five types of electromagnetic radiation

• No, only 1

• More than 1, but less than 5

• There only 5

• Yes, there more than 5

Fire is a form of electromagnetic radiation.

• Yes

• No

• Yes, it's radiation; but not electromagnetic

• It's electromagnetic energy, not a radiation

Visible light is a form of electromagnetic radiation.

• Yes

• No

• Yes, it's radiation; but not electromagnetic

• It's electromagnetic energy, not a radiation

There are some variations of visible light that are called the spectrum. Which of the following statements are correct?

• Red light has higher energy than blue light

• Red light has a lower frequency than blue light

• Red light has a shorter wavelength than blue light

• Red light has exact similar properties to blue light since both of them are EM radiations

What is the speed of electromagnetic radiation?

• 300 m/s

• 300 km/s

• 3000 km/s

• 300 000 km/s

The speed of electromagnetic radiation ...

• Doesn't affected by any circumstances

• Getting faster when entering any medium

• Getting slower when entering any medium

• Affected by the direction