Home
Class 10
PHYSICS
Suggest one way, in each case, by which ...

Suggest one way, in each case, by which we can detect the presence of:
(1) Infra-red radiations
(2) Ultraviolet radiations

Text Solution

Verified by Experts

(1) Infra-red radiations : These are detected by a thermopile.
(2) Ultraviolet radiation : When a silver chloride solution is taken in a test tube and is passed from red to violet light no change is seen. But beyond the violet end, the solution first turns violet and then it turns dark brown.
Promotional Banner

Topper's Solved these Questions

  • SAMPLE PAPER 2011

    ICSE|Exercise SECTION-II|41 Videos

  • SAMPLE PAPER 2 (PHYSICAL EDUCATION)

    ICSE|Exercise MULTIPLE CHOICE QUESTIONS|50 Videos

  • SAMPLE PAPER 2012

    ICSE|Exercise SECTION-II|43 Videos

Similar Questions

Explore conceptually related problems

State one harmful effect each of the (a) ultraviolet and (b) infrared radiations

Name the radiations which can be detected by a thermopile.

Stratosphere contains a stable layer of ozone molecules which absorbs UV radiation from the sun. The presence of ozone in atmosphere serves, as a shield to protect living organism on earth from the harmful effects of the solar ultraviolet radiation. The ultraviolet radiation are known to cause skin cancer. Ozone is formed in stratosphere by the following photochemical reactions. O_(2)(g)overset(UV)rarrO(g)+O(g) O(g)+O_(2)(g)overset(UV)hArrO_(3)(g) Ozone is thormodhynamically unstable and ecomposes to molecular oxygen. Thus a dynamic equilibrium exits between the production and decomposition of ozone molecules. Earth is protected from UV radiation by

Stratosphere contains a stable layer of ozone molecules which absorbs UV radiation from the sun. The presence of ozone in atmosphere serves, as a shield to protect living organism on earth from the harmful effects of the solar ultraviolet radiation. The ultraviolet radiation are known to cause skin cancer. Ozone is formed in stratosphere by the following photochemical reactions. O_(2)(g)overset(UV)rarrO(g)+O(g) O(g)+O_(2)(g)overset(UV)hArrO_(3)(g) Ozone is thormodhynamically unstable and ecomposes to molecular oxygen. Thus a dynamic equilibrium exits between the production and decomposition of ozone molecules. The air pollutant which are responsible to deplete the ozone layer is

Stratosphere contains a stable layer of ozone molecules which absorbs UV radiation from the sun. The presence of ozone in atmosphere serves, as a shield to protect living organism on earth from the harmful effects of the solar ultraviolet radiation. The ultraviolet radiation are known to cause skin cancer. Ozone is formed in stratosphere by the following photochemical reactions. O_(2)(g)overset(UV)rarrO(g)+O(g) O(g)+O_(2)(g)overset(UV)hArrO_(3)(g) Ozone is thormodhynamically unstable and ecomposes to molecular oxygen. Thus a dynamic equilibrium exits between the production and decomposition of ozone molecules. Maximum quantity of ozone is present in

The reagent which can't be used to detect the presence of both CO_(3)^(2-) and HCO_(3)^(-) in a mixture is -

What are ultraviolet radiations ? How are they detected ? State one use of these radiations

Give one use each of (a) microwaves, (b) ultraviolet radiations, (c) infrared radiations, and (d) gamma rays.

Statement-1 : Ultrasonics is the acoustic analogue of ultraviolet radiation Statement-2 : Ultraviolet rays do not produce visual sensations while ultrasonic waves are not heards by the human ear.

A radioactive sample is kept at the centre of an evacuated spherical vessel. (a) Out of the alpha , beta and gamma radiations, name the radiations which are (i) safe and (ii) unsafe. (b) Suggest two ways for more safety. ( c) Does evacuation of vessel help in safety ?

ICSE-SAMPLE PAPER 2011-SECTION-II
  1. State the laws of refraction of light. State at least three examples o...

    Text Solution

    |

  2. Write a relation between the angle of incidence (i), angle of emerge...

    Text Solution

    |

  3. Suggest one way, in each case, by which we can detect the presence of:...

    Text Solution

    |

  4. State any one use of infrared radiations.

    Text Solution

    |

  5. An object is placed in front of a lens between its optical centre and ...

    Text Solution

    |

  6. An object is placed in front of a lens between its optical centre and ...

    Text Solution

    |

  7. Name the type of waves which are used for sound ranging.

    Text Solution

    |

  8. Why are these waves mentioned in (i) above, not audible to us?

    Text Solution

    |

  9. Give one use of sound ranging.

    Text Solution

    |

  10. A man standing 25 m away from a wall produces a sound and receives the...

    Text Solution

    |

  11. A man standing 25 m away from a wall produces a sound and receives the...

    Text Solution

    |

  12. Name two safety devices which are connected to the live wire of a hous...

    Text Solution

    |

  13. Give one important function of each of these two devices. i) Switch ii...

    Text Solution

    |

  14. Draw a graph of Potential difference (V) versus Current (I) for an ohm...

    Text Solution

    |

  15. How can you find the resistance of the resistor from this graph?

    Text Solution

    |

  16. What is a non-ohmic resistor ?

    Text Solution

    |

  17. An electric bulb is marked 100 W, 250 V. What information does this co...

    Text Solution

    |

  18. How much current will the bulb draw, if connected to a 250 V supply?

    Text Solution

    |

  19. Three resistors are connected to a 12 V battery as shown in the figure...

    Text Solution

    |

  20. Three resistors are connected to a 12 V battery as shown in the figure...

    Text Solution

    |