हिंदी

Answer briefly. What is a carrier wave? - Physics

Advertisements
Advertisements

प्रश्न

Answer briefly.

What is a carrier wave?

एक पंक्ति में उत्तर
Advertisements

उत्तर

The high-frequency waves on which the signals to be transmitted are superimposed are called carrier waves.

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 2. (xiii) | पृष्ठ २४१

वीडियो ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्न

What role dose infra-red radiation play in maintain the Earth’s warmth


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


To which part of the electromagnetic spectrum does a wave of frequency 5 × 1011 Hz belong?


Optical and radio telescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth. Why?


Name the high energetic invisible electromagnetic waves which help in the study of the structure of crystals


State an additional use of the X-rays waves


What do you understand by the statement, "Electromagnetic waves transport momentum"?


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

(a) Visible. 


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 .


Name the waves of wavelength nearly 0.1 nm.


Two waves A and B have wavelength 0.01 Å and 9000 Å respectively.

  1. Name the two waves.
  2. Compare the speeds of these waves when they travel in vacuum.

In a Coolidge tube, electrons strike the target and stop inside it. Does the target get more and more negatively charged as time passes?


Characteristic X-rays may be used to identify the element from which they are being emitted. Can continuous X-rays be used for this purpose?


The X-ray beam emerging from an X-ray tube


For harder X-rays,
(a) the wavelength is higher
(b) the intensity is higher
(c) the frequency is higher
(d) the photon energy is higher.


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.


Name three radiations and their wavelength range which are invisible and beyond the violet end of the visible spectrum.


Name the part of the electromagnetic spectrum which is: 
Produced by bombarding a metal target with high electrons.


Name the radiations used for the detection of fracture in bones.


Answer briefly.

Why are microwaves used in radar?


Answer briefly.

Can we produce a pure electric or magnetic wave in space? Why?


Answer briefly.

Give two uses of radio waves.


The frequency of e. m waves which is best suited .to observed of radius 3 × 10–4 his of the order of


Electromagnetic waves of wavelengths λ1, λ2 and λ3 are used in a radar system, in water purifiers and in remote switches of TV, respectively.

  1. Identify the electromagnetic waves.
  2. Write one source for each of them.

The half-value thickness of an absorber is defined as the thickness that will reduce exponentially the intensity of a beam of particles by a factor of 2. The half-value thickness in (µm) for lead assuming X-ray beam of wavelength 20 pm, µ = 50 cm-1 for X-rays in lead at wavelength λ = 20 pm, is ______ µm.


Which one of the following electromagnetic radiation has the least wavelength?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×