Recently Active Optics Questions

SORRY, PUT IT IN THE WRONG SLOT. ...

two incident monochromatic waves whose wavelength differ by a small amt dλ are separated angularly atθ and θ+dθ wrt the incidence ray .the dispersive power is given by (a)dθ/dλ (b)dθ/θ (c)dλ/λ (d)λ(dλ/dθ) ...

the circular boundary of concave mirror subtends a cone of half angle θ at its centre of curvature .The minimum value of θ for which ray incident on this mirror parallel to the principal axis suffers reflection more than on ...

can u plz help me out on this one.. A point source of light is placed at a certain depth below the surface of a large deep lake.show that the fraction of light energy that escapes directly from water is given by 1/2 -1/2n n^2 ...

when the object is at distance u1 & u2 the images formed by d same lens are real n virtual resp and of same size .d focal length of the lens (a)1/2√u1+u2 (b)1/2(u1+u2) (c)√u1u2 (d)2(u1+u2) ...

*Image* a converging lens of focal length 20 cm n diameter 5cm is cut along the line AB.the part of the lens shown shaded in the diagram is now used to form an image of a pt Pplaced 30 cm away frm it on d line XYwhich is prep ...

STAT 1: A highly intense red light is going from one transparent medium to another, on coming into second medium the light colour remains red in colour but the intensity will decrease. STAT 2: Colour of light depends upon fre ...

i have some doubts in hcv hope you all will help me hc verma page 364 volume 2 objective 1 question 9 .... my answer is coming out a and i dun knoe wat mistake m making question 10 and objective 2 question 5 both contradict i ...

An FM signal has a resting frequency of 105 Mhz and highest frequency of 105.03 Mhz ,when modulated by a signal. Then the carrier swing is? ...

kal paper hai aur mujhe logic gates ko chor kar sab kuch aata hai.......plzzzzz meri help karo aur cbse type answer do.......... all are ncert problems............mere paas koi help book nahin hai........[2][2] Q1 *Image* Q2 ...

A convex lens of focal length 10 cm is placed coaxially 5cm away from a concave lens of focal length 10cm. If an object is placed 30cm in front of convex lens, find the position of final image formed by combined system. me ge ...

Maybe I am blind.........but cant understand this one......... An electron of Kinetic energy K collides elastically with stationary hydrogen atom in ground state.Then Kmax=? ...

calculate the min wavelength of X-rays emitted by an x-ray tube operating at a tube potential of 40KV?? ...

its like i gave for optics 1]if an x ray tube operates at voltage of 10000 volts, find the ratio of the de broglie wavelength of the incident electrons to the shortest wavelength of X rays produced. the specific charge of ele ...

AN OBJECT IS 20cm AWAY FROM A CONCAVE MIRROR WITH FOCAL LENGTH 15cm.IF THE OBJECT MOVES WITH THE SPEED OF 5m/s ALONG THE AXIS THEN WHAT IS THE SPEED OF THE IMAGE ? please give the final answer along with steps ...

Is my graph correct for activity vs time graph, T-half life *Image* They asked to plot activity, so i multiplied Λ - lamda on y axis, is it correct or only the amount present is correct?? ...

Two identical but independent monochromatic sources of light cannot be coherent.Why? ...

another one.......ncert quest *Image* ...

Q *Image* Q *Image* ...

In YDSE both slits produce equal intensities on the screen.A 100% transparent film is placed in front of one of the slits.Now the intensity on the center of screen becomes 75% of previous intensity.The wavelength of light is ...

Central fringe of interference pattern produced by light of wavelength 6000A is found to shift to position of 4th dark fringe after glass sheet of refractive index=1.5 is introduced.Find thickness of glass sheet. ...

In YDSE if slab whose refractive index can be varied is placed in front of one of the slits.Then plot the variation of resultant intensity at mid point on screen with refractive index(where refractive index >1) ...

The ratio of intensity at the center of a bright fringe to the intensity at the point one quarter of fringe width from center is? ...

*Image* Assertion:Powernet=0.66D Reason:Pnet=P1+P2 ...

In young's double slit exp.,60 fringes are observed in central view zone with wavelength of light 4000 A.The no. of fringes that will be observed in same view zone with 6000A light is? ...

*Image* *Image* This is not my doubt.. just 4 others to solve.... see how much time u take to solve this.. i took 2 mins for all three.. [3][4] and u can see in pics above that i had to derive... fringe width Dλ/d also in th ...

*Image* The radius of the beam of light 'r' falls on the hemispherical glass of radius 'R'(μ=4/3). Find the radius of the image formed at the base of the hemisphere.(it is kept on the table) ...

Can we produce interference pattern using UV rays..pls give reason ...

Despersive power of an achromatic doublet is 2/3. And the combined focal length of the combiation is 30cm. Find the focal length of each lens......... ...

Four equidistant slits of the same width are made one above the other on an opaque sheet & illuminated by a monochromatic parallel beam of light perpendicular to the sheet.Point P & Q are on the screen directly in front of th ...