Advertisements
Advertisements
प्रश्न
Name the part of the electromagnetic spectrum which is:
Suitable for radar systems used in aircraft navigation.
Advertisements
उत्तर
Microwaves or short radio waves.
APPEARS IN
संबंधित प्रश्न
A wave has wavelength 50 Å.
- Name the wave.
- State its speed in vacuum.
- State its one use.
An electromagnetic wave has a frequency of 500 MHz and a wavelength of 60 cm Calculate the velocity of the wave.
Can a hydrogen atom emit characteristic X-rays?
The X-ray beam emerging from an X-ray tube
| Gamma rays | D | C | Visible light | B | A |
The above table shows different parts of the electromagnetic spectrum.
(a) Identify the parts of the spectrum marked as A, B, C and D.
(b) Which of the radiations A or B has the higher frequency?
(c) State two properties which are common to all parts of the electromagnetic spectrum.
(d) Name one source of each of the radiation of electromagnetic spectrum.
(e) Name one detector for each of the radiation.
(f) Name one use of each of the radiation.
-
- Calculate the speed of the wave.
- Name the medium through which it is traveling.
Answer briefly.
Can we produce a pure electric or magnetic wave in space? Why?
Answer briefly.
Name the most harmful radiation entering the Earth's atmosphere from outer space.
If the Earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? Explain.
The magnetic field of a beam emerging from a filter facing a floodlight is given by B0 = 12 × 10–8 sin (1.20 × 107z – 3.60 × 1015t) T. What is the average intensity of the beam?
