Newest Optics Questions

Can anybody explain me HCV ques. no. 34 from the chapter sound waves?? ...

Firse CHANGE!!!! DOES THE FOL. comp GIVE +VE neutral FeCl3 Test ??? If not y not ??? *Image* ...

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1) A moving hydrogen atomin ground state, causing radiation of several wavelengths, the longest of which is 1880 nm. From the consideration of the loss in KE in collision, what is the velocity above which the atom has to move ...

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When the voltage applied to an X-ray tube is increased from V1 = 40 kV to 200 kV the wavelength interval between the Kα line and the short-wave cut off frequency of the continuous X-ray spectrum increases by a factorξ = 2. ...

Optical riddle ................................................................................. Newton told us the three laws of motion , But he also gave us a formula in optics which u have to mention . ...

*Image* *Image* whats the concept behind ...... this concept is asked frequently in the JEE ...

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a short linear object of length b lies along axis of a concave mirror of focal length f at a distance u from the pole of mirror.The size of image is aprox. equal to??? ...

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A plane miror is moving with velocity 4i+5j+8k.A point object in front of mirror moves with velocity 3i+4j+5k.Here k is along normal to plane mirror and facing towards object.Then velocity of image is ???? Ans: 3i+4j+11k ...

In an experiment to determine the focal length (f) of a concave mirror by the u-v method, a student places an object pin A on the principal axis at a distance x from the pole P. The student looks at the pin and its inverted i ...

a radioactive nucleus of mass M emits an alpha particle of mass m and recoils freely. if the kinetic energy of the alpha particle is K, find the kinetic energy of the daughter nucleus. ...

an accelerated electron strikes a target in a x ray tube with kinetic energy K. energy lost in the forst collision yields a photon of wavelength λ. if 50% of the remaining energy is lost in next collision , find the waveleng ...

which wont give dispersion??????? plz give proper reason also...... *Image* ...

A nucleus with mass no. 220 initially at rest emits an alpha particle.If Q value of reaction =5.5MeV ,then calculate KE of alpha particle ...

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In case of a ray travelling frm MEdium a to medium b WaT IS THE NECESSARY COndition/relationg between the refractive indices of a and b SO AS TO BRING ABT A PHASE CHAGE OF Î in the traveling wave.....?????????? ...

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how to find the total no of fringes in an interference pattern in YDS ...

*Image* a convergent beam is incident on two slabs placed in contact as shown .in fig where will the rays finally converge? sum 1 pl answer yaar ...

Q73 A ball is kept at a height of h above the surface of a heavy transparent sphere made of a material of refractive index μ. The radius of the sphere is R. At t=0, the ball is dropped to fall normally on the sphere. Find th ...

High quality lenses are often coated to prevent reflection. A lens has an optical index of refraction of 1.72 and a coating with an optical index of recraction 1.31. For near normal incidence the minimum thickness of the coat ...

i read this statement today.......... for no dispersion d(1/f)=0 can anyone explain it plz.... ...