Home
Class 12
PHYSICS
If the tumbler is suitably tilted and vi...

If the tumbler is suitably tilted and viewed at a suitable angle.
a. how the coin apprear ?
b. What is due to ?
c. Draw the course of the light ray.

Text Solution

Verified by Experts

a. coin floats in air
b. Due to total internal reflrection.

Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    NEW JOYTHI PUBLICATION|Exercise CONTINUOUS EVALUATION|20 Videos

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    NEW JOYTHI PUBLICATION|Exercise PREVIOUS YEAR QUESTIONS|2 Videos

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    NEW JOYTHI PUBLICATION|Exercise PRACTICE PROBLEMS FOR SELF ASSESSMENT|20 Videos

  • NUCLEI

    NEW JOYTHI PUBLICATION|Exercise COMPETITIVE EXAM CORNER|23 Videos

  • SEMICONDUCTOR ELECTRONICS : MATERIALS , DEVICES AND SIMPLE CIRCUITS

    NEW JOYTHI PUBLICATION|Exercise COMPETITIVE EXAM CORNER|37 Videos

Similar Questions

Explore conceptually related problems

Figure shows a metal rod PQ resting on the smooth rails AB and positioned between the poles of a permanent magnet. The rails, the rod and the magnetic field are in three mutually perpendicular directions. A galvonometer G connects the rails through a switch K. Length of rod = 15 cm, B = 0.50 T, resistance of the closed loop containing the rod = 9.0mOmega . Assume the field to be uniform. a. Suppose K is open and the rod is moved with a speed of 12cms^(-1) in the direction shown. Give the polarity and magnitude of the induced emf. b. Is there an excess charge built up at the ends of the rods when K is open? What if K is closed? c. With K open and the rod moving uniformly, there is no net force on the electrons in the rod PQ eventhough they do experience magnetic force due to the motion of the rod. Explain. d. What is the retarding force on the rod when K is closed? e. How much power is required (by an external agent) to keep the rod moving at the same speed (=12cms^(-1)) when K is closed? How much power is required when K is open? f. How much power is dissipated as heat in the closed circuit? What is the source of this power? g. What is the induced emf in the moving rod if the magnetic field is parallel to the rails instead of being perpendicular?

a.Figure shows a cross-section of a 'light pipe' made of glass fibre of refractive index 1.68 The outer converting of the pipe is made of a material of refractive index 1.44. What is the range of the angles of the incident rays with the axis of the pipe for which total reflections insides the pipe take place as shown in the figure. b.What is the answer if there is no outer converting of the pipe ?

A ray of light passes from denser medium to rarer medium a. What happens to the refracted ray as the angle of incidence increases from 0^(@) ? b. What is the importance of the angle C (marked in the figure above )? c. How is 'C' related to the refractive index 'n' of the medium ? Explain.

A beaker is placed on the top of a coin. The top of the beaker is closed with an opaque body with a small hole. View the coin from an angle , slowly add water through the hole while continuing to view the coin from the same angle. Repeat the procedure using cooking oil. a. What happens when water is continuously added ? b. What about the heights of water and oil, when con completely disappears ? c. In which liquid, the coin is concealed best with minimum height? Why? d. What is the valation between opitieal angle and refrective index. ?

When a solar spectrum is viewed, we can see a number of dark lines. a. What are these dark lines called ? b. How are they formed ? c. What is their importance ?

I prop (1)/(lambda^(4)) where I is the intensity of light and lambda its wavelength. a. Which law does the above expression represent ? b. Give the law statement form. c. What conclusion do you draw from this ?

A right prism is to be made by selecting a proper material and the angles A and B (BleA) as shown in figure. It is desired that a ray of light incident normally on AB emerges parallel to the incident direction after two internal reflection.a. What should be the minimum refractive index mu for this to be possible? b. For mu=5/3 is it possible to achieve this with the angle A equal to 60 degrees?

NEW JOYTHI PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS -EVALUATION QUESTION AND ANSWERS
  1. You are given an equilateral glass prism of refractive index 'n'. A li...

    Text Solution

    |

  2. a. What is the principle used in optical fibres ? b. Explain brief...

    Text Solution

    |

  3. If the tumbler is suitably tilted and viewed at a suitable angle. a....

    Text Solution

    |

  4. A ray of light passes from denser medium to rarer medium a. What hap...

    Text Solution

    |

  5. A candle is placed in front of a concave lens. a. Draw the course of...

    Text Solution

    |

  6. a. What is meant by magnification 'm' ? b. Give the mathematical re...

    Text Solution

    |

  7. The power of a lens is +2D. a . What do you mean by this ? b How i...

    Text Solution

    |

  8. You are given two convex lenses. a. What is the focal length of the ...

    Text Solution

    |

  9. Why do stars twinkle ?

    Text Solution

    |

  10. Why does a diamond sparkle with great brilliance?

    Text Solution

    |

  11. When a solar spectrum is viewed, we can see a number of dark lines. ...

    Text Solution

    |

  12. I prop (1)/(lambda^(4)) where I is the intensity of light and lambda i...

    Text Solution

    |

  13. a. What is scattering of light? b. Explain Rayleigh scattering. ...

    Text Solution

    |

  14. A plano-convex lens fits exactly into a plano-concave lens. Their surf...

    Text Solution

    |

  15. The teacher shows a thin lens and a thick lens. a. Which of these le...

    Text Solution

    |

  16. a. Is there any difference between fluorescence and phosphorescence ? ...

    Text Solution

    |

  17. It can be seen that no rainbow is seen during the middle of the day. G...

    Text Solution

    |

  18. How could a blue object appear under sodium lamp light ?

    Text Solution

    |

  19. A welder wears a mask. Give reason.

    Text Solution

    |

  20. Sha went to a doctor and said that he could not see distant objects cl...

    Text Solution

    |