Light Reflection And Refraction Class 10 Numericals Pdf Creator
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Light and reflections guide answers
Question 1. A Polaroid is placed in the path of the emergent ray at point P and rotated about an axis passing through the centre and perpendicular to the plane of the polaroid. The reflected light is plane polarised represented by arrows. As the emergent ray is unpolarised, hence intensity cannot be zero when passes through polaroid. Important points: Polarised light: The phenomenon of limiting the vibrating of electric field vector in one direction in a plane perpendicular to the direction of propagation of light wave is called polarization of light. Polaroids: It is a device used to produce the plane polarised light. It is based on the principle of selective absorption and is more effective than the tourmaline crystal, or it is a thin film of ultramicroscopic crystals of quinine iodosulphate with their optic axis parallel to each other.
This process is called reflection of light. Spherical mirrors are of two types. They are concave mirror and convex mirror. Rays of light parallel to the principal axis after reflection from a concave mirror meet at a point converge on the principal axis. Rays of light parallel to the principal axis after reflection from a convex mirror get diverged and appear to come from a point behind the mirror.
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Practice Sheets on Light Reflection & Refraction
Last updated at April 23, by Teachoo. Example If a bus is located at 5. View Answer. At what distance from the mirror should a screen be placed in order to obtain a sharp image? Find the nature and the size of the image.
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Define the principal focus of a concave mirror. It is a point on the principal axis where the rays of light parallel to principal axis meet. The radius of curvature of a spherical mirror is 20 cm. What is its fucul length?
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Light is an electromagnetic wave.