what is microwaves

Microwaves and Radar - The 'radar' beams microwaves towards a distant object and receives the reflected signals. Since both the outgoing and incoming waves travel with the velocity of light therefore by measuring the 'time delay' in receiving the signal back, we can measure the ..

The 'radar' beams microwaves towards a distant object and receives the reflected signals. Since both the outgoing and incoming waves travel with the velocity of light therefore by measuring the 'time delay' in receiving the signal back, we can measure the distance of the object from the r..

A store sells a microwave oven for $842.54. The markup rate is 36%. What is the store's cost of the microwave oven? => $611.45 or $614.35 or $632.18 or $619.51..

All the effects so far described hold true for microwave frequencies, but some are increased, and new ones are added. Atmospheric absorption and the effects of precipitation must be taken into account. So must the fact that at such short wavelengths, everything tends to happen very rapid..

The graph shows the number of gas ranges and microwave ovens sold during a period of 10 years. By which year did the sale of microwave ovens exceed the sale of gas ranges? => 1976 or 1979 or 1974 or 1970..

Henry's microwave repair bill was $87.5. This included $17.5 for each hour of labor and $35 for parts. Solve the equation 35 + 17.5 h = 87.5 to find the number of hours of labor. => 2 hours or 7 hours or 3 hours or 5 hours..

The different types of electromagnetic radiations in the increasing order of wavelengths are, gamma rays ( g ), X-rays, ultra-violet rays (U.V.), visible radiation, infrared radiation (IR), microwaves and radio wave..

Why microwaves are preferred over other waves to beam signals in a particular direction? Microwaves are radio waves with frequencies higher than television signals. The wavelengths of microwaves are of the order of a few millimeters. We know that sound waves spread and..

In astronomy, the low temperature microwave radiation that arrives at the earth's surface from all directions of outer space is called background radiation. It is so named because it forms a background to all the radio sources that have been detected by radio telescopes. Cosmic background..

Background Radiation - In astronomy, the low temperature microwave radiation that arrives at the earth's surface from all directions of outer space is called background radiation. It is so named because it forms a background to all the radio sources that have been detected by radio telesc..