Name the instrument used for measuring the angle by which the plane polarised light is rotated.

A partially polarized light (partially polarized after suitable refraction through a glass slab) is analysed through a rotating polaroid. Hence,

An unpolarized light beam is incident on the polarizer of a polarization experiment and the intensity of light beam emerging from the analyzer is measured as 100 Lumens. Now, if the analyzer is rotated around the horizontal axis (direction of light) by 30° in clockwise direction, the intensity of emerging light will be ________ Lumens.

The angle of rotation depends upona.Nature of the solventb.Nature of substancec.all of themd.Length of tube containing solution through which light passes

Name the instrument that is used to measure temperature, pressure as well as humidity at numerous altitudes within the atmosphere.a.Altimeterb.Barographc.Radiosonded.Aneroid Barometer

The pictured device is called a Sine bar. What features and functions does it have?Select all that applyIs used independently, without any other equipmentsin, cos or tan is used to evaluate the angleCan be used to measure unknown anglesCylinders separated by a known distancePrecision ground cylinders and rectangular bodyIs a practical use of trigonometryCan be used to set precise angles