Home
Class 12
PHYSICS
Ocean waves moving at a speed of 4.0 m/s...

Ocean waves moving at a speed of 4.0 m/s are approaching a beach at an angle of `30^(@)` to the normal, as shown in figure. Suppose the water depth changes abruptly at a certain distance from the beach and the wave speed there drops to 3.0 m/s. Close to the angle `theta` is :

A

`sin^(-1)(3//4)`

B

`sin^(-1)(1//4)`

C

`sin^(-1)(3//8)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    DISHA PUBLICATION|Exercise EXERCISE-2 : CONCEPT APPLICATOR|30 Videos

  • WAVE OPTICS

    DISHA PUBLICATION|Exercise EXERCISE-2 : CONCEPT APPLICATOR|30 Videos

  • THERMODYNAMICS

    DISHA PUBLICATION|Exercise EXERCISE -2 : CONCEPT APPLICATOR|29 Videos

  • WAVES

    DISHA PUBLICATION|Exercise EXERCISE -2 CONCEPT APPLICATOR|30 Videos

Similar Questions

Explore conceptually related problems

A 0.5 kg ball moving with a speed of 12 m//s strikes a hard wall at an angle of 30^(@) with the wall. It is reflected with the same speed and at the same angle . If the ball is in contact with the wall for 0.25 s , the average force acting on the wall is

A 0.5 kg ball moving with a speed of 12 m/s strikes a hard wall at an angle of 30^(@) with the wall. It is reflected with the same speed and at the same angle. If the ball is in contact with the wall for 0.25 s, the average force acting on the wall is :

A particle slides with a speed of 3m s^(-1) at P. When it reaches Q ,it acquires a speed of 4m s^(-1) after describing an angle of 60^(@) at O as shown in figure .Find the changes in the velocity of the particle between P and Q . Assume that the path followed by the particle is circular from P to Q

For the wave shown in the figure, the frequency and wavelength if its speed is 320 m/s are

A man is moving away from a 40-m high tower at a speed of 2 m/s. Find the rate at which the angle of elevation of the top of the tower is changing when he is at a distance of 30 metres from the foot of the tower. Assume that the eye level of the man is 1.6 m from the ground.

It takes 2.4 s to record the echo of a sonar. If the speed in water is 1450 m//s , find the depth of the ocean floor.

Water is flowing through a channel that is 12 m wide with a speed of 0.75m/s. the water then flows into four identical channels that have a width of 4.0 m the depth of te water does not change as it flows into the four channels. What is the speed of the water in one of the smaller channels?

A straight conductor of length 4 m moves at a speed of 10 m/s when the conductor makes an angle of 30^(@) with the direction of magnetic induction 0.1 T. then the induced emf is

A ball is thrown with speed 40 m//s at an angle 30^(@) with horizontally from the top of a tower of height 60 m . Choose the correct option

Transverse waves travel with a speed of 20.0 m//s in a string under a tension of 6.00 N. what tension is requared for a wave speed of 30.0 m//s in the same string?

DISHA PUBLICATION-WAVE OPTICS-EXERCISE-1 : CONCEPT BUILDER
  1. Figure shows wavefront P Passing through two systems A and B, and emer...

    Text Solution

    |

  2. Spherical wavefronts, emanating from a point source, strike a plane re...

    Text Solution

    |

  3. Ocean waves moving at a speed of 4.0 m/s are approaching a beach at an...

    Text Solution

    |

  4. According to Huygen's construction , tangential envelope which touches...

    Text Solution

    |

  5. A wave front AB passing through a system C emerges as DE. The system C...

    Text Solution

    |

  6. The wavefronts of a light wave travellilng in vacuum are given by x+y+...

    Text Solution

    |

  7. Find the minimum thcknessof a film which will strongly reflect the lig...

    Text Solution

    |

  8. A parallel beam of white light is reflected from a thin wedge shaped f...

    Text Solution

    |

  9. The path difference between two wavefronts emitted by coherent sources...

    Text Solution

    |

  10. To deminstrate the phenimenon of interference, we require two sources ...

    Text Solution

    |

  11. When a thin transparent plate of thickness t and refractive index mu i...

    Text Solution

    |

  12. The intensity ratio of two waves is 9:1. If they produce interference,...

    Text Solution

    |

  13. Interference was observed in interference chamber when air was present...

    Text Solution

    |

  14. White light falls normally on a film of soap water whose thickness is ...

    Text Solution

    |

  15. Two coherent light sources, each of wavelength lambda, are separated b...

    Text Solution

    |

  16. Two coherent sources separated by distance d are radiating in phase ha...

    Text Solution

    |

  17. Interference pattern is observed at 'P' due to superimposition of two ...

    Text Solution

    |

  18. Two coherent monochromatic light beams of intensities I and 4I are sup...

    Text Solution

    |

  19. The path difference between two interfering waves at a point on screen...

    Text Solution

    |

  20. For the two parallel rays AB and DE shown here, BD is the wavefront. F...

    Text Solution

    |