Home
Class 12
PHYSICS
The ozone layer on the top of the strato...

The ozone layer on the top of the stratosphere is crucial for human survival.Explain why?

A

Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.

B

Both 'A' and ’R' are true and 'R' is not the correct explanation of 'A

C

A' is true and 'R' is false

D

'A' is false and R' is true

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC WAVES

    AAKASH SERIES|Exercise EXERCISE -II|22 Videos

  • ELECTROMAGNETIC WAVES

    AAKASH SERIES|Exercise EXERCISE -IA|47 Videos

  • ELECTROMAGNETIC INDUCTION

    AAKASH SERIES|Exercise Additional Exercise|11 Videos

  • ELECTROMAGNETICS

    AAKASH SERIES|Exercise ADDITIONAL EXERCISE|13 Videos

Similar Questions

Explore conceptually related problems

Answer the following questions : (a) Optical and radio telescopes are built on the ground while X-ray astronomy is possible only from satellites orbiting the Earth. Why ? (b) The small ozone layer on top of the stratosphere is crucial for human survival. Why ?

(i) Why the thin ozone layer on the top of the atmosphere is crucial for human survival ? Identify in which part of electromagnetic spectrum does this radiation belong and write an important application of this radiation. (ii) Why are infrared waves referred to as heat waves ? How are they produced ? What role do they play in maintaining earth.s warmth through the greenhouse effect ?

Asnwer the following : (a) Name the em waves which are used for the treatment of certain forms of cancer. Write their frequency range. (b) Thin ozone layer on top of stratosphere is crucial for human survival. Why ? (c) Why is the amount of the momentum transferred by the em waves incident on the surface so small?

Rakesh and Rajesh are 8th class students. They are fond of watching cricket match, particularly when it is played between Australia and India. They observed that most of the players, when they are in the field, apply a cream on their face. They did not know its reason. One day they asked this question to their teacher. The teacher thought it to be a good question and explained the reason for applying this cream to the whole class. Based on this paragraph, answer the following questions: (i) In your opinion, what explanation did the teacher offer to the students in the class? (ii) Why is small ozone layer on top of the stratosphere considered crucial for human survival? (iii) Write any two values displayed by Rakesh and Rajesh and their class teacher?

The ozone layer absorbs

Ozone makes the stratosphere

Ozone depletion in the stratosphere is primarily due to

Ozone depletion in the stratosphere is primarily due to

Ozone depletion in the stratosphere is primarily due to

Ozone layer exist in

AAKASH SERIES-ELECTROMAGNETIC WAVES-EXERCISE -IB
  1. (A ): E.M. waves can show diffraction effect (R) : E.M waves are trans...

    Text Solution

    |

  2. (A ): In electromagnetic wave, electric and magnetic fields oscillate ...

    Text Solution

    |

  3. (A ): The light can travel in vacuum but sound cannot do so (R) : Ligh...

    Text Solution

    |

  4. (A): Gamma rays are more energetic than X-rays (R) : Gamma rays are of...

    Text Solution

    |

  5. Assertion : The earth without its atmosphere would be inhospitably col...

    Text Solution

    |

  6. A : Environmental damage has depleted the ozone layer in the atmosphe...

    Text Solution

    |

  7. (A) : The microwaves are better carriers of signals than radio waves. ...

    Text Solution

    |

  8. Assertion (A) : The presence of CO(2) in the air accelerates corrosio...

    Text Solution

    |

  9. A satellite orbiting close to the surface of earth does not fall down ...

    Text Solution

    |

  10. (A) : The average magnitude of poynting vector vecS is the intensity o...

    Text Solution

    |

  11. A : Long distance radio broadcasts use short-wave bands. R : Ionosp...

    Text Solution

    |

  12. A : It is necessary to use satellites for long distance TV transmissi...

    Text Solution

    |

  13. A : Optical and radio telescopes are built on the ground but X-ray ...

    Text Solution

    |

  14. The ozone layer on the top of the stratosphere is crucial for human su...

    Text Solution

    |

  15. Assertion A pulsar is a source of radio waves that varies in intensity...

    Text Solution

    |

  16. (A) : Quasar emits radiowaves more than radio galaxy. (R) : Quasar has...

    Text Solution

    |

  17. (A) : Dipole oscillations produce electro­magnetic waves. (R) : Accel...

    Text Solution

    |

  18. Assertion (A): wedge(m(H^(o+))) and wedge(m(overset(c)(O)H)) ions are ...

    Text Solution

    |

  19. (A) : In electromagnetic waves electric field and magnetic field lines...

    Text Solution

    |

  20. The transverse nature of electromagnetic waves is proved by which of t...

    Text Solution

    |