Recently Active Optics Questions

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A no. of tuning forks are arranged in the order of increasing frequency & any tw successive tuning foks produce 4 beatsper second,whn sounded together. If the last tuning fork has a frequency of octave higher than that of the ...

two thin symmetrical lenses of different nature have equal radii of curvature R=20 cm.the lenses are put close together and immersed in water. the focal length of the system is 24 cm. find the difference between the refractiv ...

a paralle beam of light falls normally on the first face of a prism of small angle. at the second face it is partly reflected and partky transmitted, the reflected beam striking the first face again, and emerging from it in a ...

x rays of wavelength .140 nm are scattered frm a block of carbon .wat ll be wavelngth of x ray scattered at 90 ° a).140 nm b).142 nm c).144 nm d).146 nm ...

wats fraunhofer diffraction experimnt ...

for 2 coherent sources , I net =(√I1 + √I2)2 wen path diff = 0 now take these 2 and separate them like interference exp , you get max , min but avg intensity remains I1 + I2 now if u put these 2 sources together , ...

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1. A young s double slit experiment uses a monochromatic source. The shape of the interference fringes formed on a screen............ ans given: straight line But is it not hyperbola(the actual shape)..or else the close obser ...

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A object is kept at a point (40,20√3) in front of a concave mirror of radius=20. find magnification of image. (its not just 1/v+1/u=1/f !!!!) ...

i have a doubt that why does maximum appers at asinθ = (n + 1/2)λ ?? please yaar koi batao and why intensity decreases ... as n increases .. ...

Refractive index of the ionosphere is:_ a)0 b)les than 1 c) one d) more tahn one ...

A balloon is filled with CO2 , then for sound wave this will behave as a:- a)converging len b)diverging lens c)both of theaove d)none of the above ...

detrmine d max wavelngth that wud b absored by hydrogen like atom z=3 consider most ordinary condition ...

*Image* (B = b (-)decay,a= alpha decay) A and D are related as: a) Isotopes b) same nuclei c) isoelectronic d) isomers I have confusin between a) & c) ...

If Youngs double slit experiment uses monochromatic source,then shape of interference fringes on screen is straight line,whereas if Youngs double hole experiment is used,the sahape is hyperbola.WHY?? ...

Statement – I: Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion. and Statement – II For heavy nuclei, binding energy per nucleon increases with increasing Z while for light nuclei it dec ...

Asser:if the t1/2 of a sample is 40 days then the sample will decay 25% in 20 days reason:N=(N0)n where n=time elapsed/t1/2 ...

*Image* I thot the Question says "in the lie of fall of the ball" meant there will be no deviation in the ray path and hence i wrote 12m/s [2] Can sum1 tell me wat is wrong in my thinkin as the ans given is 16m/s ...

A Cassegrain telescope uses two mirrors 20 mm apart. radius of curvature of the mirrors 220mm and 140 mm.when object at infinity..final image will be formed at...??? ...

A thin glass (refractive index 1.5) lens has optical power of -5D in air . Its optical power in a liquid medium with refractive index 1.6 will be ? 1)2D 2)-2D 3)-1D 4)1D ...

a photo cell is illuminated by a small bright source placed1m away , d number of electrons emmited by photocathode wud ...

A small object is placed 10cm in front of a plane mirror. If u stand behind the object 30 cm from the mirror, and look at its image, then for wat distance must you focus ur eyes?? My ans : 40cm Is dat wrong??-It is just a ver ...

NOR gate ke truth table ka kya formula hai???????????? ...

*Image* FIND THE LOCATION OF THE FINAL IMAGE!!!!!! ...

when a white light is incident on a convex lens d colur of light which is less deviated from optical axis is ive got it as red but d ans is violet can nebody give d perfect xplanation for dat ...

2 lens 1 convex of focal length 50cm & anoder concave of focal len 75 cm r kept in contact den wat will b d nature of combination? ...

a convex lens with focal length f is trisected parallel to the optical axis.what's the new focal length? ...

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