हिंदी

Calculate the wavelength of a microwave of a frequency of 8.0 GHz.

Advertisements
Advertisements

प्रश्न

Calculate the wavelength of a microwave of a frequency of 8.0 GHz.

संख्यात्मक
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.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 13: Electromagnetic Waves and Communication System - Exercises [पृष्ठ २४१]

APPEARS IN

बालभारती Physics [English] Standard 11 Maharashtra State Board
अध्याय 13 Electromagnetic Waves and Communication System
Exercises | Q 3. (iv) | पृष्ठ २४१

वीडियो ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्न

What role dose infra-red radiation play in physical therapy?


Identify the part of the electromagnetic spectrum which is:

produced by bombarding a metal target by high speed electrons.


Name the parts of the electromagnetic spectrum which is

used to treat muscular strain.

Write in brief, how these waves can be produced.


Name the parts of the electromagnetic spectrum which is

used as a diagnostic tool in medicine.

Write in brief, how these waves can be produced.


To which part of electromagnetic spectrum does a wave of frequency 3 × 1013 Hz belong?


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?


Arrange the following radiations in the order of their increasing wavelength:

X-rays, infrared rays, ratio waves, gamma ray and microwaves.


What is the range of the wavelength of the following electromagnetic waves?

(a) Infrared.


What is the range of the wavelength of the following electromagnetic waves?

(a) Micro waves .


Give the range of wavelength of the electromagnetic waves visible to us.


Name the waves produced by the changes in the nucleus of an atom.


Can Lα X-ray of one material have shorter wavelength than Kα X-ray of another?


Why is exposure to X-rays injurious to health but not exposure to visible light, when both are electromagnetic waves?


Moseley's Law for characteristic X-ray is √v = a(Z − b). Here,


50% of the X-rays coming from a Coolidge tube are able to pass through a 0.1 mm thick aluminium foil. If the potential difference between the target and the filament is increased, the fraction of the X-rays passing through the same foil will be


Visible light passing through a circular hole forms a diffraction disc of radius 0.1 mm on a screen. If an X-ray is passed through the same setup, the radius of the diffraction disc will be


The potential difference applied to an X-ray tube is increased. As a result, in the emitted radiation,
(a) the intensity increases
(b) the minimum wavelength increases
(c) the intensity remains unchanged
(d) the minimum wavelength decreases.


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 ultraviolet radiation.


Give one use of electromagnetic radiation in Microwaves.


Choose the correct option.

How does the frequency of a beam of ultraviolet light change when it travels from air into glass?


Solve the numerical problem.

Calculate the frequency in MHz of a radio wave of wavelength 250 m. Remember that the speed of all EM waves in a vacuum is 3.0 × 108 m/s.


Light of wavelength `3500A` is incident on two metals A and B whose work functions are 3.2 eV and 1.9 eV respectively. Which metal will emit photoelectrons?


A radio can tune to any station in the 7.5 mHz to 12 MHz band. What is corresponding wave length band.


Why does microwave oven heats up a food item containing water molecules most efficiently?


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?


Given below in the left column are different modes of communication using the kinds of waves given in the right column. 

A.  Optical Fibre
Communication
P. Ultrasound
B. Radar Q. Infrared Light
C. Sonar R. Microwaves
D. Mobile Phones  S. Radio Waves

From the options given below, find the most appropriate match between entries in the left and the right column.


What do electromagnetic waves require for propagation?


Which part of the electromagnetic spectrum can the human eye detect?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×