Microwave Technology and Its Applications

Who was the engineer responsible for the development of the technology that led to the microwave oven?

• Thomas Edison

• Percy Spencer

• Alexander Graham Bell

• Nikola Tesla

What did Percy Spencer notice when he stood near a magnetron?

• His shoes caught fire

• His hair stood on end

• His candy bar melted

• His watch stopped working

What type of molecules do microwaves interact strongly with?

• Covalent molecules

• Polar molecules

• Non-polar molecules

• Ionic molecules

What is the primary function of a cavity magnetron in a microwave oven?

• To rotate the food

• To cool the food

• To generate microwaves

• To absorb microwaves

How do microwaves heat food molecules?

• Chemically

• Mechanically through friction

• By ionizing them

• By freezing them

Why is the term 'microwave radiation' often misunderstood?

• It indicates microwaves are cold

• It means microwaves are sound waves

• It suggests microwaves are visible

• It implies harmful ionizing radiation

What happens when microwaves encounter a marshmallow?

• It burns

• It dissolves

• It puffs up

• It shrinks

What is a potential danger of microwaving metal objects?

• They can cool the food

• They can cause sparks

• They can absorb microwaves

• They can melt

What is the recommended safety measure when using a microwave oven?

• Use it only at night

• Stand very close to it

• Stand a few feet away

• Leave the door open

Why do some microwavable packages use a thin metal coating?

• To crisp the food’s surface

• To absorb more microwaves

• To make the food cook unevenly

• To prevent the food from cooking