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A layer in the Earth's atmosphere called Ionosphere facilitates radio communication. Why? 1. The presence of ozone cause the reflection of radio waves to Earth. 2. Radio waves have a very long wavelength. Which of the statements given above is/are correct?

A layer in the Earth's atmosphere called Ionosphere facilitates radio communication. Why? 1. The presence of ozone cause the reflection of radio waves to Earth. 2. Radio waves have a very long wavelength. Which of the statements given above is/are correct? Correct Answer Neither 1 nor 2

The correct answer is Neither 1 nor 2.

Key Points

  • The Ionosphere: 
    • This layer is located between 80 km and 400 km and is an electrically charged layer.
    • This layer is characterized by the ionization of atoms.
    • Because of the electric charge, radio waves transmitted from the earth are reflected back to the earth by this layer.
    • Temperature again starts increasing with height because of radiation from the sun.
    • Ozone can be found in Stratosphere. Hence, statement 1 is incorrect.
    • Radio waves are a type of electromagnetic radiation best-known for their use in communication technologies, such as television, mobile phones and radios.
    • Radio waves are a type of electromagnetic (EM) radiation with wavelengths in the electromagnetic spectrum longer than infrared light.
    • They have frequencies from 300 GHz to as low as 3 kHz and corresponding wavelengths from 1 millimetre to 100 kilometres. Hence, statement 2 is incorrect.  

Related Questions

A layer in the Earth's atmosphere called Ionosphere facilitates radio communication. Why?
1. The presence of ozone causes the reflection of radio waves to Earth.
2. Radio waves have a very long wavelength.
Which of the statements given above is fare correct?
Why does the ionosphere of the Earth's atmosphere facilitate radio communication? i. The presence of ozone causes the reflection of radio waves to earth ii. Radio waves have a very long wavelength
Consider the following statements: 1. Ozone is found mostly in the Stratosphere. 2. Ozone layer lies 55 - 75 km above the surface of the earth. 3. Ozone absorbs ultraviolet radiation from the Sun. 4. Ozone layer has no significance for life on the earth. Which of the above statements are correct?
Which of the following statements is/are correct concerning Ozone gas? 1. Good ozone is found in the upper part of the atmosphere called the Troposphere. 2. The thickness of the ozone in a column of air from the ground to the top of the atmosphere is measured in terms of Dobson units (DU).  3. Research indicates that depletion of the stratospheric ozone layer is being reduced worldwide.  Select the correct answer using the code given below.
Which of the following is/are correct in matching the layer of atmosphere and its characteristic ? I. Troposphere : weather phenomena II. Stratosphere : ozone layer III. Ionosphere : radio waves reflected to earth's surface IV. Mesosphere : Aurorae
Which of the following is/are correct in matching the layer of atmosphere and its characteristic ?
I. Troposphere : weather phenomena
II. Stratosphere : ozone layer
III. Ionosphere : radio waves reflected to earth's surface
IV. Mesosphere : Aurorae
Which of the following represent represents correct matching of the layers of atmosphere. A. Exosphere (i) Layer help in radio transmission. B. Troposphere (ii) Upper most layer of atmosphere. C. Stratosphere (iii) Lower most layer of atmosphere D. Thermosphere (iv) Layer contains ozone gas.
Which of the following statements is/are correct regarding the structure of the atmosphere: 1. The temperature of the air decreases steadily with an increase in height. 2. The height of the Troposphere is less at the equator than at the poles. 3. The ionosphere facilitates radio transmission on earth. Which of the statements given above is/are correct?
Which of the following statement is are correct? (1) Water vapor in the atmosphere increases with altitude. (2) Ozone Layer is found in stratosphere where airplanes fly. (3) Rotation of earth, its angle of inclination, and transparency of the atmosphere are associated with insulation of the surface of the earth. (4) Exosphere is the atmospheric layer which reflects radio waves
Some small cubes of same height 7 cm but variable length and width are put inside a large cuboid of height 21 cm. Length and width of cuboid is 32 cm and 24 cm, respectively. Small cubes are put such that cubes at the bottom most layer is of similar base area; second layer contains all the cubes of similar base area and third layer have all the cubes of similar base area. Which of the following statement(s) given below is / are TRUE? A: If side of each small cubes at bottom most layer is 8 cm, then maximum number of small cubes that can be put at bottom most layer is 12. B: If maximum of 48 cubes can be put at second layer, then side of each cube at second layer is 6 cm. C: If side of each small cubes at third layer is 1.6 cm, then maximum number of small cubes that can be put at third layer is 300.