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प्रश्न
The distance from the pole to the focus is called ______.
पर्याय
pole length
focal length
principal axis
None of the above
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उत्तर
The distance from the pole to the focus is called focal length.
Explanation:
The distance from the pole (the center of a spherical mirror or lens) to the focus (the point where light rays converge or appear to diverge) is called the focal length.
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संबंधित प्रश्न
What is a spherical mirror?
Draw a ray diagram to show the formation of image by a concave mirror for an object placed between its pole and focus. State three characteristics of the image.
Define the following term in relation to concave mirror.
Focal length
AB is the object, A1B1 is its image. MM' is the position of the mirror. Complete the ray diagram and find the position of the center of curvature and focus of the mirror. Also, measure the focal length.
Define the term Centre of curvature.
Define the term Principle focus.
Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
