Light Waves and Their Properties

The video explores the nature of light, focusing on its properties and the electromagnetic spectrum. It explains visible light, colors, and how white light forms rainbows. The video also discusses ultraviolet light, its perception by animals, and its practical uses. Additionally, it covers invisible light applications like X-rays and MRI, and delves into radio waves and their communication uses.

What part of the electromagnetic spectrum can human eyes detect?

• Visible light waves

• Infrared waves

• Ultraviolet waves

• Gamma waves

What happens when white light passes through a prism?

• It turns into a single color

• It becomes invisible

• It separates into a spectrum of colors

• It gets absorbed

Which color of light has the longest wavelength?

• Blue

• Green

• Violet

• Red

Which animals are known to see ultraviolet light?

• Reindeer

• Dogs

• Elephants

• Cats

How do reindeer use UV light to their advantage?

• To navigate

• To see predators

• To communicate

• To find food

What is a radiograph used for?

• To detect magnetic fields

• To measure temperature

• To capture sound waves

• To create images of bones

What technology uses radio waves and magnetic fields to image the brain?

• Ultrasound

• MRI

• PET Scan

• CT Scan

Which type of light wave has the longest wavelength?

• Radio waves

• Gamma rays

• X-rays

• Ultraviolet waves

Why can radio waves travel farther than other waves?

• They are less dense

• They are more powerful

• They have longer wavelengths

• They are faster

Which device uses radio waves to communicate over long distances?

• Walkie-talkie

• Calculator

• Landline telephone

• Tablet