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

Angle of minimum deviation, Angle of Minimum Deviation: The angle of de...

Angle of Minimum Deviation: The angle of deviation has least value when incident ray and emergent ray make equivalent angle with the normal. The value of angle of deviation is

Moving coil galvanometer, what would be the introduction to a moving ciol g...

what would be the introduction to a moving ciol galvanometer

Find the distance between the two cleavage planes, Q. An X-ray diffraction ...

Q. An X-ray diffraction of a crystal gave a closest line at an angle of 6o27'. If the wavelength of X-ray is 0.58Ao, find the distance between the two cleavage planes. 2d Sinθ

Time of flight, projectile down an inclined plane

projectile down an inclined plane

Intensity, example of earth quake intensity

example of earth quake intensity

Curie point, It describes the temperature above which the material loses it...

It describes the temperature above which the material loses its spontaneous polarization and piezoelectric characteristics.

What is the molar depression constant for benzene, Two elements A and B for...

Two elements A and B form compounds having molecular formulae AB 2 and AB 4 . dissolved in 2O g of benzene, 1 g of AB2 lower the freezing point by 2.3 K, whereas 1 g of AB4 lowers

Explain battery powered vehicles, Battery powered vehicles Used DC seri...

Battery powered vehicles Used DC series motors are the first choice. Recently AC motors with frequency changers are being considered.

Electrostatics , Y the charge n voltage. Remain constant ven we connect cap...

Y the charge n voltage. Remain constant ven we connect capacitors in series. N parallel. Respectively??

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