Recently Active Optics Questions

if i1,r1,r2 are angle of incidence,reflection and refraction,then calculate critical angle of medium........ *Image* ...

which among the following is unstable? a)neutron b)proton c)electron d)alpha particle please explain the ans ...

Q1.) in convex lens distance of an object from focus : 8 cm. its image distance from focus : 8 cm. find the focal length ...

How would the diffraction pattern of a single slit be affected when the monocromatic source of light is replaced by white light? ...

In any interference pattern, we get only dark and light bands. Why are we not getting bands of intermediate brightness? [7] ...

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Q1.) in a concave mirror, distance of an object from focus : 4 cm. ---------------its image from focus : 9 cm. find the focal distance.. (give the sign as well) (time : 1 min). ...

What is dispersive power? ...

A plane mirror is placed in yz plane facing towards the negative x axis.The mirror is moving parrallel to y axis with a speed of 5cm/s A point object P is moving in front of the mirror with a velocity 3cm/si+4cm/sj+5cm/sk fin ...

A ray is incident parallel to one of the mirrors.The ray will start retracing its path after 3rd reflection if θ=___ *Image* ...

in an electron tube 1.8X1017 electrons are emitted per sec on applying 400V to a plate All the electrons reach the plane The maximum current generated in the plate circuit is ans is 29 microA ...

current flowing through a p-n junction when revese biased is 2X10-7A If a forward bias of 0.1 V is applied across the junction Then what is the current ...

what minimum height should a mirror secured on a wall have for a man to see his reflection full size without changing the position of his head?determine also the required distance between the floor and the lower edge of t ...

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a stream of electrons moving with 3X107m/s gets deflected by an electric field of 18 V/cm normal to their path What is the transverse deflection in travelling through a horizontal direction of 10 cm in the field ...

guys help me out... i've just started optics and ma studymaterial has some topics which i've not heard of... So tell me which are the topics there in the iit-jee syllabus??? I'd a look over the brochure but didn't able to get ...

Q2.) an object is placed somewhere in front of a mirror... and its image is formed somewhere.. magnification = m. now the object is made to lie down on the principal axis. hence find the lateral magnification .. (1 min.) ... ...

"A thick mirror forms a number of images out of which second one is brightest." i cant get head or tail of the statement can some one explain please ...

Photons of energy 5e.V are incident on cathode.Electrons reaching the anode have kinetic energies varying from 6e.V to 8e.V.wat is the workfunction of the metal.Electrons r acc through a potential difference of 5V *Image* ...

this is about speed of light and relativity.. [1] it is in reference to TargetIIT » Forum » Basic Foundation » this really is puzzling me Speed of light : What is it.. It is one of the ultimate truth.. (at least today...11 ...

The colours in white light are V I B G Y O R. Even though the colour in the middle is green, why do we take yellow to represent λavg and μavg of light? I'm really [7][7][7] and [2][2][2]. Pls tell me if You can' ...

Q For a transistor amplifier in common emmiter configuation for load impedanceof 1kΩ (hfe=50 and hoe=25) the current gain is? also post the sol........ ...

A lens of focal length 20.0cm and aperture radius 2.0cm is placed at a distance 30.0cm from a point source of light.On the other side a screen is placed at a distance 50.0cm from the lens.The radius of spot of light formed on ...

here's a Q. please answer and give your valuable reasoning. WHICH OF THE FOLLOWING CHARACTERISTICS OF PHOTOELECTRIC EFFECT SUPPORTS THE PARTICLE NATURE OF RADIATION A) EXISTENCE OF THRESHOLD FREQ. B) INSTANTANEOUS NATURE ...

In photoelectric effect experiment, is the photo current independent of frequency of incident light? [7] ...

question is that if R.I varies μ°(1+x) from [0,L] in and ray along Y=X is path of incident light then wat is angle when it comes out from lat point ...

Can the electron involved in photoelectric effect be a free electron? Answer with reason ...

A thin hollow equiconvex lens silvered at the back converges a parallel beam of light, at a distance of 0.2m in front of it. Where will it converge the same light, if filled with water (µ = 4/3). ...

A depletion layer looks like what is given below, right? *Image* So won't the positive ions in n junction attract the free electrons in n junction and negative ions in p junction attract holes from the p junction? ...

Why does hight dopant concentration lead to small depletion layer and low dopant concentration lead to large depletion layer? [7] ...