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

Radio waves and microwaves, Radio waves and microwaves: What are micro...

Radio waves and microwaves: What are microwaves and radio waves? Ans: Microwaves: 1. The wavelength ranges from 10μm to10m 2. Commonly produced by Electromagnetic osc

Ratio of the frequencies of harmonics, Determine the ratio of the frequenci...

Determine the ratio of the frequencies of harmonics in an air column of same length in a) a closed pipe and b) an open pipe

What is the path of the force exerted on the particle, A positively charged...

A positively charged particle is pitiful southward in a downward-directed uniform magnetic field. The magnetic force is the merely force if any acting on the particle. What is the

How electric current passing by a conductor, What occurs to the power dissi...

What occurs to the power dissipation if the value of electric current passing by a conductor of constant resistance is doubled? Normal 0 false false false

Gravitation, l question.. a particle rest on the top of a h...

l question.. a particle rest on the top of a hemi spher radius R find the smallest horizondal velocity that must imparted to the particle if it''s to leave the hemi

Ametropia-defective eyesight due to focusing, Defective eyesight due to foc...

Defective eyesight due to focusing(refractive)problems- ametropia: It is often possible to correct ametropia completely with glasses There are four general types of ametrop

If an object isnt moving, Q. If an object isn't moving, no external force a...

Q. If an object isn't moving, no external force acts on it.  No it is always not true, there would be balanced forces which cancel each other out leaving no net force. Example:

Obtain relativistic expression for the kinetic energy, Obtain Relativistic ...

Obtain Relativistic expression for the kinetic energy of the particle. Derive mass energy relation. Show that total energy E and momentum P are related, where m is rest mass and

simulation, what is meaning simulation laser produced plasm

what is meaning simulation laser produced plasma

Thermodynamics, show that work is a path function not a property

show that work is a path function not a property

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