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

Find the operating voltage of the coolidge tube, Q. The minimum wavelength ...

Q. The minimum wavelength of X-rays produced in a Coolidge tube is 0.05 nm. Find the operating voltage of the Coolidge tube. λmin = 12400 A 0 / V = 0.5 X 10 -10 m Theref

Chemistry in action - detergents, chemistry in action - Detergents A re...

chemistry in action - Detergents A result of high dissolving power, the logically happening water all time consists of dissolved matters, majorly ionic substances. Hard water h

Explain the meaning of ram effect?, A ram-air intake is any intake design w...

A ram-air intake is any intake design which uses the dynamic air pressure produced by vehicle motion to increase the static air pressure inside of the intake manifold on an engine,

Illustrates the electric motors, Illustrates the Electric Motors? An el...

Illustrates the Electric Motors? An electric motor is basically the reverse of an electric generator. It is a machine which turns electrical energy - AC from the wall or dire

Acceleration due to gravity, Who was the first person to show that all obj...

Who was the first person to show that all objects fall toward Earth with constant _________.

How many types of fibers are there, How many types of fibers are there? ...

How many types of fibers are there? There is truly only one fiber optic. The word "fiber optics" applies really to a stem of light physics dealing along with the properties of

Describe pitch and image quality in msct, Question 1. Discuss the gener...

Question 1. Discuss the general guidelines to be followed for whole body CCT 2. Describe pitch and image quality in MSCT 3. List the advantages of SCT in pediatrics. Expl

Diagram of nicol prism, Please explain diagram of nicol prism, How its work...

Please explain diagram of nicol prism, How its working and how its mechanism,,,

Explain gausss law in electrostatics, Explain Gauss's law in electrostatics...

Explain Gauss's law in electrostatics? 1C of charge is same to the charge of n number of electrons in magnitude. What is the value of n? What happens to the force between t

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