If a polarizer is placed in front of each slit, what changes be observed in the interference fringes (a) when the two polarizing axes are parallel? (b) when the two polarizing axes are perpendicular?

When light falls on two polaroid sheets, one observes complete brightness then the two polaroids axes are

Two polaroids are placed in the path of unpolarized beam of intensity I_(0) such that no light is emitted from the second polarid. If a third polaroid whose polarization axis makes an angle theta with the polarization axis of first polaroid, is placed between these two polariods then the intensity of light emerging from the last polaroid will be

Unpolarized light of intensity 32 Wm^(-3) passes through three polarizers such that the transmission axis of the last polarizer is crossed with the first. If the intensity of the emerging light is 3 Wm^(-2) , what is the angle between the transmission axces of the first two polarizers ? At what angle will the transmitted intensity be maximum ?

Answer the following: (a) In Young's double slit experiment, derive the condition for (i) constructive interference and (ii) destructive interference at a point on the screen. (b) A beam of light consisting of two wavelengths, 800 nm and 600 nm is used to obtain the interference fringes in a Young's double slit experiment on a screen placed 1.4 m away. If the two slits are separated by 0.28 mm, calculate the least distance from the central bright maximum where the bright fringes of the two wavelengths coincide.

How would the angular separation of interference fringes in Young's double slit experiment change when the distance of separation between slits and screen is doubled ?

Assertion : When a thin transparent sheet is placed in front of both the slits of Young's experiment, the fringe width will remains same. Reason : In Young's experiment, the fringe width is directly proportional to wavelength of the source used.

When can you say that two vectors vec(A) and vec(B) are (a) parallel and (b) perpendicular .

Two poalroids are placed at 90^(@) to eachother and the transmitted intensity is zero. What happens when one more polaroid is placed between these two bisecting the angle between them ? What will be the diraction of polarization of outcoming beam ?

Predict the polarity of the capacitor when the two magnets are quickly moved in the directions marked by arrows.

In a system of two polarisers , it is found that the intensity of light from the second polarized is half from that of the first polariser .The angle between their pass axes is