Home
Class 11
PHYSICS
On a very hot day, a boy standing at a l...

On a very hot day, a boy standing at a large distance observers a neon monochromatic lamp hanging at a height h above the ground. He observe the lamp as shown in the figure

A

at a height h

B

at a height more than h.

C

at a height less than h.

D

at a height that is varying with time, sometimes more than h and sometimes less than h.

Text Solution

Verified by Experts

The correct Answer is:
C

Due to irregular scattering or by looming he observed the lamp at a height at a height less than h
Promotional Banner

Topper's Solved these Questions

  • UNITS, DIMENSION & MEASUREMENT

    RESONANCE ENGLISH|Exercise Exercise|27 Videos
  • WORK POWER AND ENERGY

    RESONANCE ENGLISH|Exercise Exercise|37 Videos

Similar Questions

Explore conceptually related problems

A plane mirror is placed at the bottom of a tank containing a liquid of refractive index mu . P is a small object at a height h above the mirror. An observer observes P and its image in the mirror. The apparent distance between two will be

If a 1.5 m tall girl stands at a distance of 3 m from a lamp-post and casts a shadow of length of 4.5 m on the ground, then the height of the lamp-post is (a) 1.5 m (b) 2 m (c) 2.5 m (d) 2.8 m

A stream of non-viscous liquid emerges from a very short outlet tube at the base of a large . Open tank , in which the depth of liquid is h. The tube is at a fixed angle theta to the ground as shown in the figure. The maximum height of the stream y is

A 1.6m tall girl stands at a distance of 3.2m from a lamp-post and casts a shadow of 4.8m on the ground. Find the height of the lamp-post by using (i) trigonometric ratios (ii) property of similar triangles.

A sound source is moving on a circular path of radius R with constant angular speed omega in anticlockwise direction and emits a frequency n. An observer performs simple harmonic along the path QPR with time period T = ( 2pi ) /( omega ) as shown in the figure. If at t = 0 source is at A and observer is at Q and assume OP is very large as compare to radius R and QP, then -

Consider a water jar of radius R that has water filled up to height H and is kept on a stand of height h (see figure) through a hole of radius r(rltltR) at its bottom the water leaks out and the stream of water coming down towards the gound has a shape like a funnel as shown in the figure. it the radius of teh cross-section of water stream when it hits the ground is x. then.

A circus wishes to develop a new clown act. Fig. (1) shows a diagram of the proposed setup. A clown will be shot out of a cannot with velocity v_(0) at a trajectory that makes an angle theta=45^(@) with the ground. At this angile, the clown will travell a maximum horizontal distance. The cannot will accelerate the clown by applying a constant force of 10, 000N over a very short time of 0.24s . The height above the ground at which the clown begins his trajectory is 10m . A large hoop is to be suspended from the celling by a massless cable at just the right place so that the clown will be able to dive through it when he reaches a maximum height above the ground. After passing through the hoop he will then continue on his trajectory until arriving at the safety net. Fig (2) shows a graph of the vertical component of the clown's velocity as a function of time between the cannon and the hoop. Since the velocity depends on the mass of the particular clown performing the act, the graph shows data for serveral different masses. The slope of the line segments plotted in figure 2 is a figure constant. Which one of the following physical quantities does this slope represent?

A circus wishes to develop a new clown act. Fig. (1) shows a diagram of the proposed setup. A clown will be shot out of a cannot with velocity v_(0) at a trajectory that makes an angle theta=45^(@) with the ground. At this angile, the clown will travell a maximum horizontal distance. The cannot will accelerate the clown by applying a constant force of 10, 000N over a very short time of 0.24s . The height above the ground at which the clown begins his trajectory is 10m . A large hoop is to be suspended from the celling by a massless cable at just the right place so that the clown will be able to dive through it when he reaches a maximum height above the ground. After passing through the hoop he will then continue on his trajectory until arriving at the safety net. Fig (2) shows a graph of the vertical component of the clown's velocity as a function of time between the cannon and the hoop. Since the velocity depends on the mass of the particular clown performing the act, the graph shows data for serveral different masses. From figure 2, approximately how much time will it take for clown with a mass of 60 kg to reach the safety net located 10 m below the height of the cannot?

An open vessel full of water is falling freely under gravity. There is a small hole in one face of the vessel, was shown in te figure. The water which comes out from the hole at the instant when hole is at height H above the ground strikes the ground at a distance of x from P. Which of the followin is correct for the situation described? (a). The value of x is 2sqrt((2hH)/(3)) (b). The value of x is sqrt((4hH)/(3)) (c). The value ofx can't be computed from information providec. (d). The question is irrevalent as no water comes out from the hole.

A circus wishes to develop a new clown act. Fig. (1) shows a diagram of the proposed setup. A clown will be shot out of a cannot with velocity v_(0) at a trajectory that makes an angle theta=45^(@) with the ground. At this angile, the clown will travell a maximum horizontal distance. The cannot will accelerate the clown by applying a constant force of 10, 000N over a very short time of 0.24s . The height above the ground at which the clown begins his trajectory is 10m . A large hoop is to be suspended from the celling by a massless cable at just the right place so that the clown will be able to dive through it when he reaches a maximum height above the ground. After passing through the hoop he will then continue on his trajectory until arriving at the safety net. Fig (2) shows a graph of the vertical component of the clown's velocity as a function of time between the cannon and the hoop. Since the velocity depends on the mass of the particular clown performing the act, the graph shows data for serveral different masses. If a clown holds on to hoop instead of passing through it, what is the position of the cable so that he doesn't hit his head on the ceiling as he swings upward?

RESONANCE ENGLISH-WAVE OPTICS-Exercise
  1. The wavefront of a light beam is given by the equation x + 2y + 3x = c...

    Text Solution

    |

  2. In a single-slit diffraction experiment, the width of the slit is made...

    Text Solution

    |

  3. On a very hot day, a boy standing at a large distance observers a neon...

    Text Solution

    |

  4. If torch is used in place of monochromatic light in Young's experiment...

    Text Solution

    |

  5. White light is used to illuminate the two slits in a Young's double sl...

    Text Solution

    |

  6. The ratio of intensities of two waves are given by 4:1. The ratio of t...

    Text Solution

    |

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

    Text Solution

    |

  8. The contrast in the fringes in any interference pattern depends on -

    Text Solution

    |

  9. Young's experiment is performed in air and then performed in water, th...

    Text Solution

    |

  10. The Youn'g double slit experiment is performed with blue and green lig...

    Text Solution

    |

  11. A light ray incidents on water (n=4/3) surface from air and reflected ...

    Text Solution

    |

  12. In a Fresnel biprism experiment the two positions of lens give separat...

    Text Solution

    |

  13. The ratio of diameters of fourth and ninth half period zones is:

    Text Solution

    |

  14. The maximum numbers of possible interference maxima for slit separatio...

    Text Solution

    |

  15. Calculate the width of central maxima, if light of 9000Å incidents upo...

    Text Solution

    |

  16. Two slits at a distance of 1mm are illuminated by a light of wavelengt...

    Text Solution

    |

  17. A parallel beam of monochromatic light is used in a Young's double sli...

    Text Solution

    |

  18. Which of the following statement is correct?

    Text Solution

    |

  19. A single slit of width 0.1mm is illuminated by parallel light of wavel...

    Text Solution

    |

  20. A light wave of frequency 5 xx 10^(14) Hz enters a medium of refractiv...

    Text Solution

    |