Basics of Electromagnetism

What type of waves are electromagnetic waves?

• Mechanical Waves

• Longitudinal Waves

• Transverse Waves

• Sound Waves

Which of the following is NOT a property of electromagnetic waves?

• They can travel through a vacuum.

• They require a medium for propagation.

• They can travel at the speed of light.

• They exhibit both electric and magnetic fields.

What is the speed of electromagnetic waves in a vacuum?

• 150,000 km/s

• 300,000 km/s

• 1,000,000 km/h

• 500,000 m/s

Which color of light has the longest wavelength in the visible spectrum?

• Red

• Blue

• Green

• Yellow

Which electromagnetic waves are commonly used for communication purposes, including radio and TV signals?

• Infrared Waves

• Microwaves

• Ultraviolet waves

• X-rays

What is the function of the ozone layer in the Earth's atmosphere regarding ultraviolet (UV) rays?

• It absorbs UV rays.

• It reflects UV rays.

• It amplifies UV rays.

• It has no effect on UV rays.

Which of these electromagnetic waves have the highest energy in the spectrum?

• Radio Waves

• Infrared Waves

• Ultraviolet waves

• X-rays

What phenomenon describes the bending of electromagnetic waves as they pass from one medium to another?

• Diffraction

• Reflection

• Refraction

• Absorption

What device uses the principles of electromagnetic waves to detect and visualize objects in the dark or through obstacles?

• Sonar

• Telescope

• Microscope

• Radar

In the electromagnetic spectrum, what comes after microwaves in terms of increasing frequency?

• Infrared waves

• X-rays

• Ultraviolet rays

• Gamma rays