Optics, Physics

Assignment Help:

A spider is hanging by means of its own silk thread directly above a transparent fixed sphere of r = 20cm .... the refractive index of material of sphere is root(2).... and height of the spider is 2r = 40cm .... an insect initially sitting at the bottom directly below the spider starts crawling along vertical circular path with constant speed pi/4 cm/s.. for how long will the insct be invisible to the spider. Assume that it crawls once around the circle .

Solution) Spider is able to see only half of the sphere which is topmost hemispherical surface. when insct enters in bottom hemispherical surface it becomes invisible for the spider. a/c question insct is travelling vertical circular path it travels pi/4cm in 1sec.then it will travel 2pi r dist i.e. 40picm in 160sec. hence it will travel pi r i.e20pi (half circle) in 80s.


Related Discussions:- Optics

Relative maximum in intensity, A pair of speakers separated by 0.700 m are ...

A pair of speakers separated by 0.700 m are driven by the same oscillator at a frequency of 688 Hz. An observer, originally positioned at one of the speakers, begins to walk along

The maximum power applied to the strain gage, You design a ¼-arm bridge cir...

You design a ¼-arm bridge circuit that provides the maximum possible efficiency, using a 15 V constant voltage power supply you have in your lab.  The circuit you design is shown a

Find out which liquid has greater refractive index, In a Newton's ring set ...

In a Newton's ring set up, the gap between the glass plate and the lens is filled with a transparent liquid. If the liquid is replaced by a second liquid, the rings shrink. Which o

Axis &planes, Ask questionwhat r the axis&planes in human body.? In nature ...

Ask questionwhat r the axis&planes in human body.? In nature or in daily life is it applied or happening? #Minimum 100 words accepted#

Light-emitting diode, Describe the internals of a light-emitting diode (LEO...

Describe the internals of a light-emitting diode (LEO). Describe what happens internally when sufficient current is applied to activate LED.  What isthe device pictured? Wh

Kinematic equation, Ask question #A sprinter runs 100.0 m. If he travels at...

Ask question #A sprinter runs 100.0 m. If he travels at constant acceleration of 1.95 m/s2 for the first 6.00 s, and then at constant velocity for the remaining time, what was his

Explain the nuclear notation?, Explain the Nuclear Notation? Chemical r...

Explain the Nuclear Notation? Chemical reactions deal with the number of electrons exchanged or shared.  Nuclear reactions, on the other hand, involve protons and neutrons and

Evaluate the maximum change in the period, The variable period of a moon of...

The variable period of a moon of Jupiter, which is the basis of measurement of the speed of light in Roemer's method (whoever heis), is regarded as the Doppler affect. The period o

Determine the corresponding error in the computed discharge, The discharge ...

The discharge over a triangular notch can be written as  Q = (8/15) Cd (2g)0.5 tan(θ/2) H5/2 If an error of 1% in measuring H is introduced determine the corresponding error

Name the type of modulation scheme, Name the part of modulation scheme pref...

Name the part of modulation scheme preferred for digital communication

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd