Electromagnetic Spectrum

What type of electromagnetic radiation has the shortest wavelength?

• Ultraviolet rays

• Gamma rays

• X-rays

• Radio waves

What type of waves are used for communication technologies like WiFi and text messaging?

• Sound waves

• Light waves

• Radio waves

• Microwaves

What is the effect of radio waves on the human body?

• Radio waves are harmful and can cause serious health issues.

• Radio waves are generally considered safe and do not have significant effects on the human body at typical exposure levels.

• Radio waves can cause immediate physical harm to humans.

• Radio waves have been proven to cause long-term genetic damage.

What is the primary source of ultraviolet radiation?

• The moon

• Artificial lamps

• The sun

• Clouds

What is the term for the distance between the peaks of two consecutive waves?

• Frequency

• Amplitude

• Wavelength

• Velocity

What are infrared waves commonly used for?

• Remote controls, thermal imaging, and night vision.

• Cooking food in microwaves.

• Transmitting radio signals over long distances.

• Creating visible light for displays.

What is the electromagnetic spectrum?

• The electromagnetic spectrum is the range of all types of electromagnetic radiation, from radio waves to gamma rays.

• The electromagnetic spectrum is a measure of the speed of light in a vacuum.

• The electromagnetic spectrum refers to the visible light spectrum only.

• The electromagnetic spectrum is the range of sound waves in the atmosphere.

What is the purpose of using X-rays in medicine?

• To treat infections

• To view the inside of the body

• To perform surgeries

• To measure blood pressure

What are the characteristics of visible light?

• Visible light is a type of sound wave that can be heard by humans.

• Visible light is the portion of the electromagnetic spectrum that can be detected by the human eye, with wavelengths ranging from approximately 400 to 700 nanometers.

• Visible light is a form of radiation that is invisible to the human eye.

• Visible light consists of wavelengths longer than infrared and shorter than ultraviolet.

What type of waves are used in microwave ovens to heat food?

• Ultrasound waves

• Infrared waves

• Microwaves

• Radio waves