Microwaves

A microwave's frequency can vary between..

• 300 megahertz to 1,000 megahertz

• 300 megahertz to 300,000 megahertz

• 100 megahertz to 300,000 megahertz

• 100 megahertz to 1,000 megahertz

A microwave's wavelength can vary between..

• 10mm to 50mm

• 0.1cm to 30cm

• 1mm to 300mm

• 20mm to 3,000mm

• 30mm to 100mm

Where are microwaves located on the electromagnetic spectrum?

• between visible light and ultraviolet

• between infrared and visible light

• between x-rays and gamma rays

• between radio and infrared waves

What three objects are microwaves used in?

• teddy bears, computers, and televisions

• microwave ovens, cellphones, and satalittes

• glasses, toasters, and blenders

• speakers, engines, and intercoms

What are the three uses of microwaves?

• an alternative of surgery

• to see objects through heat

• cleans up polluted soil

• a faster way to travel

• to heat up food

What are some dangers of microwaves?

• unusual heart rates

• unusual heart sizes

• external heating to cells

• cataracts

• internal heating to body tissues

What year was the existence of microwaves discovered?

• 1874

• 1964

• 1974

• 1864

Who discovered the existence of microwaves?

• William Herschel

• Percy Spencer

• James Clerk Maxwell

• Perry Spencer

What item gives off microwaves?

• stars

• moons

• planets

• galaxies

Microwaves were first used for radar in _____ .

• Civil War

• World War II

• Revolutionary War

• World War I