Reflection of Light by Mirror Subject: Physics Experiment: Reflection of Light by Mirror Task: Reflection of light by mirror. Required accessories: A plane mirror and a torch-light. Procedure: Keep the minor on the floor of the room in such a way that…
Define and Describe on Polaroids Subject: Physics A Polaroid is a material which polarizes light. The phenomenon of selective absorption is made use of in the construction of polariods. There are different types of polaroids. A Polaroid consists of micro crystals of…
Explain Uses of Polaroid Subject: Physics A Polaroid is a material which polarizes light. It consists of microcrystals of herapathite. Each crystal is a doubly refracting medium, which absorbs the ordinary ray and transmits only the extraordinary ray. Uses of Polaroid…
Define and Describe on Double Refraction Subject: Physics Bartholinus discovered that when a ray of unpolarised light is incident on a calcite crystal, two refracted rays are produced. This phenomenon is called double refraction (Fig: a). Hence, two images of a single object…
Describe on Nicol Prism Subject: Physics Nicol prism was designed by William Nicol. One of the most common forms of the Nicol prism is made by taking a calcite crystal whose length is three times its breadth. It is cut into…
Explain Types of Crystals Subject: Physics Crystals like calcite, quartz, ice and tourmaline having only one optic axis are called uniaxial crystals. Crystals like mica, topaz, selenite and aragonite having two optic axes are called biaxial crystals. Three basic types of…
Explain Polarization by Reflection Subject: Physics Polarization by Reflection: The simplest method of producing plane polarized light is by reflection. Malus discovered that when a beam of ordinary light is reflected from the surface of transparent media like glass or water, it…
Describe Brewster’s Law Subject: Physics Sir David Brewster conducted a series of experiments with different reflectors and found a simple relation between the angle of polarization and the refractive index of the medium. It has been observed experimentally that the…
Explain on Pile of Plates Subject: Physics The phenomenon of polarization by reflection is used in the construction of pile of plates. It consists of a number of glass plates placed one over the other as shown in Figure in a tube…
Define Polarization Subject: Physics The phenomena of reflection, refraction, interference, diffraction are common to both transverse waves and longitudinal waves. But the transverse nature of light waves is demonstrated only by the phenomenon of polarization. It is a property of…