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प्रश्न
Define the following term in relation to concave mirror.
Principal focus
उत्तर
It is a point on the principal axis, where a beam of light, parallel to the principal axis, after reflection actually meet.
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संबंधित प्रश्न
A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distances should he measure to get the focal length of the mirror?
What type of image is formed:
on a cinema screen?
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?
Name the two kinds of spherical mirrors and distinguish between them.
Define the terms focus and focal length of a concave mirror. Draw diagram to illustrate your answer.
Name the kind of mirror used to obtain:
A real and diminished image.
Define the following term:
spherical mirror
In the following figure shows a concave mirror with its pole (P), focus (F) and centre of curvature (C). Draw a ray diagram to show the formation of the image of an object AB by the concave mirror.
