Advertisements
Advertisements
प्रश्न
Calculate the wavelength of a microwave of a frequency of 8.0 GHz.
Advertisements
उत्तर
Given: ν = 8 GHz = 8 × 109 Hz, c = 3 × 108 m/s
To find: Wavelength (λ)
Formula: c = νλ
Calculation: From formula,
λ = `"c"/ν`
= `(3xx10^8)/(8xx10^9)`
= 3.75 × 10−2
= 3.75 cm
The wavelength of microwave is 3.75 cm.
APPEARS IN
संबंधित प्रश्न
How are infrared waves produced?
What physical quantity is the same for X-rays of wavelength 10−10 m, red light of wavelength 6800 Å and radiowaves of wavelength 500 m?
Give a reason for the following:
Long-distance radio broadcasts use short-wave bands. Why?
A wave has wavelength 50 Å.
- Name the wave.
- State its speed in vacuum.
- State its one use.
Arrange the following radiations in the order of their increasing wavelength:
X-rays, infrared rays, ratio waves, gamma ray and microwaves.
Name the region beyond the violet end of the spectrum called.
State the approximate range of wavelength associated with visible light.
Give one use of ultraviolet radiation.
Name the waves of wavelength nearly 0.1 nm.
When a Coolidge tube is operated for some time it becomes hot. Where does the heat come from?
If the potential difference applied to the tube is doubled and the separation between the filament and the target is also doubled, the cutoff wavelength
The X-ray beam emerging from an X-ray tube
The Kβ X-rays from certain elements are given below. Draw a Moseley-type plot of √v versus Z for Kβ radiation.
| Element | Ne | P | Ca | Mn | Zn | Br |
| Energy (keV) | 0.858 | 2.14 | 4.02 | 6.51 | 9.57 | 13.3 |
The wavelength of Kα X-ray of tungsten is 21.3 pm. It takes 11.3 keV to knock out an electron from the L shell of a tungsten atom. What should be the minimum accelerating voltage across an X-ray tube having tungsten target which allows production of Kα X-ray?
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
State the name and the range of wavelength of the invisible electromagnetic waves beyond the red end of the visible spectrum.
Name the radiation which can be detected by thermopile.
Identify the part of the electromagnetic spectrum used in (i) radar and (ii) eye surgery. Write their frequency range.
Name the radiation of the electromagnetic spectrum which is used for the following:
Radar and Give the frequency range.
Name two sources of infrared radiation.
State three properties of infrared radiations similar to that of visible light.
Give one use of electromagnetic radiation in Microwaves.
Give one use of electromagnetic radiation in Ultraviolet radiation.
Answer briefly.
What is a carrier wave?
The fundamental frequency of an open organ pipe is 300 Hz. The first overtone of this pipe has same frequency as first overtone of a closed organ pipe. If speed of sound is 330 m/s, then the length of closed organ pipe is:
Which is the correct ascending order of wavelengths?
Assertion (A): Ultraviolet radiations is scattered more as compared to the microwave radiations.
Reason (R): Wavelength of ultraviolet radiation is more than the wavelength of microwave radiation.
What is the speed of radio waves in vacuum?
Name the electromagnetic radiation that has been used in obtaining the image below.

