microwaves Flashcards
1
Q
how are microwaves (and radio waves) used in satellites
A
the signal from a transmitter is transmitted into space and picked up by a satellite receiver dish which transmits the signal back to earth where its received by a satellite dish
2
Q
what happens to microwaves in microwave ovens
A
microwaves are absorbed by water molecules in food
3
Q
how do microwaves cause the water to heat up in food
A
microwaves are absorbed and transfer energy into water molecules in the food causing it to heat up
4
Q
how does heating up water molecules lead to cooking the food
A
water molecules transfer energy to rest of the molecules in food by heating which quickly cooks the food
5
Q
what is the danger of microwaves
A
can cause internal heating of body cells
