Home
Class 12
PHYSICS
Two towers on the top of the two hills a...

Two towers on the top of the two hills are 40 mm apart. The line joining them passses 50m above a hill half way between the towers. What is the longest wavelength of radio waves, which can be sent between the towers without appreciable diffraction effect?

Text Solution

Verified by Experts

The correct Answer is:
`0.125m`
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    NEW JOYTHI PUBLICATION|Exercise EVALUATION QUESTIONS AND ANSWERS|18 Videos

  • WAVE OPTICS

    NEW JOYTHI PUBLICATION|Exercise CONTINUOUS EVALUATION (assignment)|8 Videos

  • WAVE OPTICS

    NEW JOYTHI PUBLICATION|Exercise SOLUTION TO EXERCISES FROM NCERT TEXT|21 Videos

  • SEMICONDUCTOR ELECTRONICS : MATERIALS , DEVICES AND SIMPLE CIRCUITS

    NEW JOYTHI PUBLICATION|Exercise COMPETITIVE EXAM CORNER|37 Videos

Similar Questions

Explore conceptually related problems

Two towers on top of two hills are 40 km apart. The line joining them passes 50 m above a hil halfway between the towers. What is the longest wavelength of radio waves, which can be sent between the towers without appreciable diffraction effects?

Two friends A and B are standing a distance x apart in an open field and wind is blowing from A to B. A beats a drum and B hears the sound t_1 timed after he sees the event. A and B interchange their positions and the experiment is repeated. The velocity of sound in still air is v and the velocity of wind is u . This time B hears the drum t_2 time after he sees the event. Suppose A and B change their positions in such a way that the line joining them becomes perpendicular to the direction of wind while maintaining the separation x . What will be the time lag B finds between seeing and hearing the drum beating by A?

Two point sources of sound are kept at a separation of 10 cm. They vibrate in phase to produce waves of wavelength 5.0 cm. What would be the phase difference between the two waves arriving at a point 20 cm from one source (a) on the line joining the sources and (b) on the perpendicular bisector of the line joining the sources ?

Figure shows an aluminium wire of length 60 cm joined to a steel wire of length 80 cm and stretched between two fixed supports. The tension produced is 40 N . The cross-sectional area of the steel wire is 1.0 mm^(2) and that of the aluminimum wire is 3.0 mm^(2) The minimum frequency of a tuning fork which can produce standing waves in the system with the joint as a node is 10P (in Hz ) the find P . Given density of aluminimum is 2.6 g//cm^(3) and that of steel is 7.8 g//cm^(3) .