Home
Class 12
PHYSICS
A tourmaline crystal is placed in the pa...

A tourmaline crystal is placed in the path of a polarised beam of light. If it is rotated through one complete rotation, what change will be observed in the intensity of the transmitted light?

Text Solution

Verified by Experts

The optic axis of the tourmaline crystal is placed along the direction fo polarisation of the polaried light. The light will be transmitted through the crystal and its intensity will remain unchanged. Now taking the light ray as axis of rotation of the crystal, it is rotated through one complete rotation. the observations are as follows - (i) the intensity will gradually diminish and becomes zero when the crystal is rotated through `90^(@)`, (ii) next intensity begins to increase and becomes equal to its initial value when the crystal is rotated through `180^(@)`, (ii) again intensity begins to decrease and becomes zero when the crystal is rotated through `270^(@)` and (iv) finally intensity begins to increase and becomes equal to its initial value when the crystal is rotated through `360^(@)`.
Promotional Banner

Topper's Solved these Questions

  • DIFFRACTION AND POLARISATION OF LIGHT

    CHHAYA PUBLICATION|Exercise NCERT TEXTBOOK QUESTIONS WITH ANSWER HINT|5 Videos

  • DIFFRACTION AND POLARISATION OF LIGHT

    CHHAYA PUBLICATION|Exercise NCERT EXEMPLEAR QUESTIONS WITH ANSWER HINT|2 Videos

  • DIFFRACTION AND POLARISATION OF LIGHT

    CHHAYA PUBLICATION|Exercise SECTION RELATED QUESTIONS|20 Videos

  • CURRENT ELECTRICITY

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|16 Videos

  • DIGITAL CIRCUITS

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|6 Videos

Similar Questions

Explore conceptually related problems

Explain what is observed when a beam of light is passed through a colloidal sol.

What happens in the following activities and why? A beam of light is passed through a colloidal solution

When a polariod, placed in the path of light, is rotated, there is no change of intensity of light. The incident light-

Two enanitomers rotate the plane of polarisation of plane polarised light-

A solution of d-glucose in water rotates the plane polarised light

If white light is used instead of monochromatic light in Young's double slit experiment then what change in the fringe width be observed ?

A narrow beam of unpolarised light of intensity I_(0) is incident on a polaroid P_(1) . The light transmitted by it is then incident on a second polaroid P_(2) with its pass axis making angle 60^(@) relative to the pass axis of P_(1) . Find the intensity of the light transmitted by P_(2) .

What is observed when visible light is passed through a hydrophobic colloidal solution?

An electric dipole of moment p is placed in equilibrium position in a uniform electric field of intensity E. to rotate the dipole through an angle theta from its initial position, the required moment of the torque is _____________. [fill in the blank]

When a polaroid, placed in the path of light is rotated , the intensity of light appears to vary but never reduces to zero. The light is