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प्रश्न
Explain the following term:
Incident ray
Draw diagram/diagrams to show them.
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उत्तर
Incident ray: The light ray striking a reflecting surface is called the incident ray.
संबंधित प्रश्न
A simple microscope is used by watch repairers. Give reason.
Define the following term in the context of spherical mirrors:- Principal axis
Define (a) centre of curvature (b) radius of curvature (c) pole (d) principal axis, and (e) aperture, of a spherical mirror with the help of a labelled diagram
A 50 cm tall object is at a very large distance from a diverging lens. A virtual, erect and diminished image of the object is formed at a distance of 20 cm in front of the lens. How much is the focal length of the lens?
An optical device has been given to a student and he determines its focal length by focusing the image of the sun on a screen placed 24 cm from the device on the same side as the sun. Select the correct statement about the device.
(A) Convex mirror of focal length 12 cm
(B) Convex lens of focal length 24 cm
(C) Concave mirror of focal length 24 cm
(D) Convex lens of focal length 12 cm
Define the term Focus of a concave mirror.
