Home
Class 12
PHYSICS
Doctor uses .optical fibre. to observe i...

Doctor uses .optical fibre. to observe inner parts of body, which works on ...... principle.

A

refraction

B

reflection

C

total internal reflection

D

scattering

Text Solution

Verified by Experts

The correct Answer is:
C
total internal reflection
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    KUMAR PRAKASHAN|Exercise SECTION-D (MULTIPLE CHOICE QUESTIONS (MCQs))(MCQs FROM .DARPAN. BASED ON TEXTBOOK)(MCQs BASED ON TEXTUAL ILLUSTRATION AND EXERCISE)|24 Videos

  • MOVING CHARGES AND MAGNETISM

    KUMAR PRAKASHAN|Exercise SECTION D (MCQs ASKED IN COMPETITIVE EXAMS)|34 Videos

  • SAMPLE QUESTION PAPER

    KUMAR PRAKASHAN|Exercise PART-B SECTION-C|5 Videos

Similar Questions

Explore conceptually related problems

Explain use of optical fibre in medical field.

The hydrolic jockey which is used in automobile work shops, works on the principle of

When a particle is undergoing motion, the diplacement of the particle has a magnitude that is equal to or smaller than the total distance travelled by the particle. In many cases the displacement of the particle may actually be zero, while the distance travelled by it is non-zero. Both these quantities, however depend on the frame of reference in which motion of the particle is being observed. Consider a particle which is projected in the earth's gravitational field, close to its surface, with a speed of 100sqrt(2) m//s , at an angle of 45^(@) with the horizontal in the eastward direction. Ignore air resistance and assume that the acceleration due to gravity is 10 m//s^(2) . Consider an observer in frame D (of the previous question), who observes a body of mass 10 kg acelerating in the upward direction at 30 m//s^(2) (w.r.t. himself). The net force acting on this body, as observed from the ground is :-

Write down name of two devices which works on principle of electromagnetic induction.

Dharmendra is a welder , working at Amit.s house . After electric welding done with naked eyes , he used a grinder to smoothen the welding joints . Accidentally , some particle fell into his eye . He was then crying due to pain . Amit took him to an eye hosptial by a taxi. Amit took him to an eye hospital by a taxi . The doctor used a device connected to two electric wires to remove the particle from his eye . Dharmendra inquired what happened to his eye and what device did the doctor use to remove the particle from his eye . Amit as a science students of class X explained to Dharmendra and adivsed him to be carefull in future as he had a responsible risky job of welding . What device was used by the doctor to remove the partcile ?

Dharmendra is a welder , working at Amit.s house . After electric welding done with naked eyes , he used a grinder to smoothen the welding joints . Accidentally , some particle fell into his eye . He was then crying due to pain . Amit took him to an eye hosptial by a taxi. Amit took him to an eye hospital by a taxi . The doctor used a device connected to two electric wires to remove the particle from his eye . Dharmendra inquired what happened to his eye and what device did the doctor use to remove the particle from his eye . Amit as a science students of class X explained to Dharmendra and adivsed him to be carefull in future as he had a responsible risky job of welding . What value do you learn from Amit during this episode ?

Which of the following is used in optical fibres ?

KUMAR PRAKASHAN-RAY OPTICS AND OPTICAL INSTRUMENTS-SECTION-D (MULTIPLE CHOICE QUESTIONS (MCQs))(MCQs ASKED IN COMPETITIVE EXAMS)
  1. Astronunt in space shuttle at 400 km height from Earth surface is obse...

    Text Solution

    |

  2. A substance is dipped in liquid, then due to which reason, substances ...

    Text Solution

    |

  3. Doctor uses .optical fibre. to observe inner parts of body, which work...

    Text Solution

    |

  4. n1 and n2 are refractive indices of core and cladding of optical fibre...

    Text Solution

    |

  5. Focal lenghts of objective and eye-piece of telescope 200 cm and 2 cm ...

    Text Solution

    |

  6. Light ray bends when it travels from one medium to another medium beca...

    Text Solution

    |

  7. Lens is kept nearer to eye to observe a small thin net of wire at 8 cm...

    Text Solution

    |

  8. Flint glass lens is made of refractive index 1.5. When it is placed in...

    Text Solution

    |

  9. The leaf which has only green pigament is given light of 0.6328 um wav...

    Text Solution

    |

  10. Aperture of lens of a camera is f and its exposure time is (1)/(60) s....

    Text Solution

    |

  11. Intensity of point-like source at 1000 m is I. it is changed to 16I, t...

    Text Solution

    |

  12. Focal lengths of objective and eye-piece of microscope is 1.6 cm and 2...

    Text Solution

    |

  13. Power of a convex lens of refractive index 3/2 is 2.5 D in air. If it ...

    Text Solution

    |

  14. The surface which doesn.t reflect is given incidence light with 18 W//...

    Text Solution

    |

  15. For concave mirror, image obtained at d2 from focus for object at d1 f...

    Text Solution

    |

  16. Object of small length 1 is placed on the axis of concave mirror of fo...

    Text Solution

    |

  17. Two lenses of focal lengths -20 cm and + 10 cm are conneceted to form ...

    Text Solution

    |

  18. A: Stars twinkle in sky at night, planets don.t. R: Volume of star...

    Text Solution

    |

  19. A: Owl can move easily at night time. R : There are so many rods i...

    Text Solution

    |

  20. A: Red substance seems to be black in presence of yellow light. R:...

    Text Solution

    |