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Syllabus

how does the angle of minimum deviation of glass prism vary if the incident violet light is replaced by red light???

In a Young's double slit experiment the intensity at the cetral maxima is I_{0}. Find the intensity at a distanceB(beta)/4 from the central maxima where B(beta) is the fringe width.what is the difference between polariser and analyser?

state the conditions for sustained interference of light.

(1) 10 mm (2) 10

^{–3}mm (3) 10 pm (4) 1 cmDraw reflected wavefront when a plane wavefront is incident on concave mirror, convex mirror, concave lens and convex lens.

explain the Huygens principle with example?

What is Fresnel distance? derive an expression for it.

why are coherent sources required to produce the interference of light.

the intensity at the central maxima (o) in a young's double slit experiment is I

_{o}. If the distance OP equals 1/3rd of the fringe width of the pattern , show that the intensity at a point would be I_{0}/4.in the experiment on diffraction due to single slit show that

I) The intensity of diffraction fringes decreases as the order n increases

ii) angular width of the central maximum is twice that of the firdt order secondary maximum

what is the relation between polarising angle and critical angle

Q.13. Monochromatic green light of wavelength 5$\times {10}^{-7}$ m illuminates a pair of slits 1 mm apart. The separation of bright lines on the interference pattern formed on a screen 2 m away is

(1) 0.25 mm

(2) 0.1 mm

(3) 1.0 mm

(4) 0.01 mm

also write the formula for limit of resolution for a telescope and a microscope.

what is the difference between scattering and diffraction?

Q.19. In Young's double slit experiment, when two light waves form third minimum, they have

(1) Phase difference of 3$\mathrm{\pi}$

(2) Path difference of 3$\lambda $

(3) Phase difference of $\frac{5\mathrm{\pi}}{2}$

(4) Path difference of $\frac{5\lambda}{2}$

explian young's modulus by searle's method..

which of the following waves can be polarised.(i) heat waves (ii) sound wave?and why.

An experimental set up similar to young's double slit experiment to observe the interference of light.

Here SS

_{2 }- SS_{1}= lambda/4write down the conditions for

(1)constructive interfernece

(2) destructive interference in terms of path difference S

_{2}p - S_{1}P = deltaDoes the central fringe observed in the above set up lie above or below O . Give reason

(1)screen is moved away from the plane of the slits.

(2)the monochromatic source is replaced by another monochromatic source of shorter wavelength

(3) the monochromatic source is replaced by another monochromatic source of longer wavelength

(4)slit width is increased.

(5)monochromatic light is replaced by white light.

^{0}. The percentage of incident light now transmitted through the system is (ans:25%)Two polariods P1 and P2 are placed with their pass axes perpendicular to each other. Unpolarised light of intensity I

_{o }is incident on P1. A third polaroid P3 is kept in between P1 and P2 such that its pass axis makes an angle 45^{0 }with that of P1. determine the intensity of light transmitted though P1, P2 and P3.A stretched string of length 200 cm supports a

stationary wave with points having a displacement

amplitude of mm being separated by equal

intervals of 20 cm. To which overtone do these

vibrations belong â€‹

1. 5

2. 4

3. 6

4. 3

Draw a graph showing the variation of intensity of polarised light transmitted by an analyser.

Plz...give the answers fast sir!!!

A light bulb and an open coil inductor are connected in series to an A.C source through a key .The Key is closed and after sometime iron rod is inserted into the interior of inducror . The glow of light bulb...(a)Increase (b) Decreases (c) Uncharged

WHEN rod is inserted what will be your answer if ac is replaced by dc .How the glow of bulb of change if the no of turns of coil is reduced.

(a)In a single slit diffraction experiment, the width of the slit is made double the original width. How does this affect the size and intensity of the central diffraction band?(b)In what way is diffraction from each slit related to the interference pattern in a double-slit experiment?(c)When a tiny circular obstacle is placed in the path of light from a distant source, a bright spot is seen at the centre of the shadow of the obstacle. Explain why?(d)Two students are separated by a 7 m partition wall in a room 10 m high. If both light and sound waves can bend around obstacles, how is it that the students are unable to see each other even though they can converse easily.(e)Ray optics is based on the assumption that light travels in a straight line. Diffraction effects (observed when light propagates through small apertures/slits or around small obstacles) disprove this assumption. Yet the ray optics assumption is so commonly used in understanding location and several other properties of images in optical instruments. What is the justification?.^{0}, then the distance between the stars must be? (ans : 1.95 x 10^{11}m)A beam of light consisting of two wavelengths, 800nm and 600nm is used to obtain the interference fringes in Young's double slit experiment on a screen placed 1.4m away. If the two slits are separated by 0.28mm, calculate the least distance from the central bright maximum where the bright fringes of the two wavelength coincide??

name the exp which shows the wave nature of an electron? which phenomenon was observed in this exp using electron beam.?

When

monochromatic lightis incident on a surface separating two media, thereflected & refractedlight both hav thesame frequencyas theincident frequency.Cud u explain in detail'why'?Q.5. A thin film of water ($\mu $ = 4/3) is 3100 Å thick. If it is illuminated by white light at normal incidence. The colour of film in the reflected light will be

(1) Blue

(2) Black

(3) Yellow

(4) Red

PLZ DERIVE THE EXPRESSION OF ANGULAR FRINGE WIDTH............

What is the shape of the wavefront in each of the following cases:

(a)Light diverging from a point source.(b)Light emerging out of a convex lens when a point source is placed at its focus.(c)The portion of the wavefront of light from a distant star intercepted by the Earth.what is meaning of geometrical shadow???

Diffraction defines the limit of ray optics.give explanations? - 3 marks

Show that the angular width of the first diffraction fringe is half that of the central fringe.

Two radio frequency point sources separated by 2.0m are radiating in phase with wavelength 0.5m.A detector moves in a circular path around the two sources in a plane containing them.find how many maxima it detects?

^{2})5) A block of mass 'm' moving with velocity (v) collides perfectly inelastically with another identical block attached to spring of force constant K. What will be the amplitude of resulting SHM?

two independent light sources cannot act as coherent sources.why?

away from the screen. Two interference patterns can be seen on the screen one due to

light with wavelength 480 nm, and the other due to light with wavelength 600 nm.

What is the separation on the screen between the fifth order bright fringes of the two

interference patterns?

State Huygens Principle ??? Derive laws of reflection and refraction using it ...

Q24. In a modified set-up of Young's double slit experiment, it given that

SS_{2}–SS_{1}= 2$\lambda $/3 i.e. the source S is not equidistant from the slitsS_{1}andS_{2}.(i) Obtain the conditions for constructive and destructive interference at any point P on the screen in terms of the path difference $\delta $ =

S_{2}P–S_{1}P(ii) Does the observed central bright fringe lie above or below O? Give reason to support your answer.

why is sonometer box hollow from inside?

Q35. Due to effect of interference, floating oil layer water is visible coloured, due to observation of the event the thickness of oil layer should be :

(1) 10 nm (2) 0.1 $\mathrm{\mu}$m (3) 1 mm (4) 10 mm

Two polaroids are placed with their optiic axis perpendicular to each other. One of them is rotated through 45 degrees then what is the intensity of light emerging from the second polaroid if I

_{o}is the intensity of the unpolarised light?how does the fringe width of interference fringes change,when thw whole apparatus of Young's experiment is kept in liquid of refractive index 1.33??

(a) What would be the fringe-width?

(b) At what distance from the geometrical centre will the nearest maximum be located?

Find the thickness of a plate which will produce a change in optical path equal to one fourth of the wavelength λ of the light passing through it normally. The refractive index of the plate is µ.

plz answer this question :- In a double slit diffraction arrangement , what should be the width of each slit to obtain 10 maxima of double slit pattern within the central maximum of the single slit pattern ? [ two slits are made 1mm apart ]

Assume that light of wavelength 6000Å is coming from a star. What is the limit of resolution of a telescope whose objective has a diameter of 100 inch?

what does it mean by path difference and phase difference plz explain me in detail

(A) 1.2

(B) 0.6

(C) 2.4

(D) 1.5

wht is locus??wht a wave front actually is?

to 6000 Å and the angular width of the central maxima in the resulting diffraction pattern is

measured. When the slit is next illuminated by light of wavelength λ’, the angular width

decreases by 30%. Calculate the value of the wavelength λ’.

what is central maximum?

what is pass axis of af a polaroid ?

ExplAIN THE BAnD THeORy OF SOLIDS IN EaSY LANGUagE..._{max}-I_{min /}I_{max}+I_{min}_{}is -----------What is the Brewster angle for air to glass transition? (Refractive index of glass = 1.5.)

(A) three

(B) four

(C) two

(D) infinite

In young's double slit experiment the two slits 0.15mm apart are illuminated by monochromatic light of wavelength 450nm. The screen is 1m away from the slits. Find the distance of the second

a) bright fringe

b) dark fringe from central maximum

Light of wavelength 5000 Å falls on a plane reflecting surface. What are the wavelength and frequency of the reflected light? For what angle of incidence is the reflected ray normal to the incident ray?

What is the expression for the angular width of the central maximum in single slit diffraction? How to derive it?

polarisation of light by reflection by finding Brewster angle for different solutions.

kindly suggest me the names of five solutions which polarise light.

A slit of width

ais illuminated by a light of wavelength 700nm. what will be the value of slit widthawhena) first minimum faces at an angle of diffraction 30 degree.

b) first maximum faces at an angle of diffraction 30 degree. pls.. explain

18.In a double slit experiment to find the separation between slits by displacement method, the separations of images of slits were found to be 16 mm and 9 mm respectively. The actual separation between slits will be(1) 12.5 mm

(2) 12 mm

(3) 3.5 mm

(4) 144 mm