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प्रश्न
Explain the following term related to spherical lenses: focal length
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उत्तर
Focal Length:-
The focal length of a lens is the distance between optical centre and principal focus of the lens.
संबंधित प्रश्न
Explain the following term related to spherical lenses:- aperture
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.
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Write the spherical mirror's formula and explain the meaning of each symbol used in it.
Select the correct option:
A concave mirror is made by cutting a portion of a hollow glass sphere of radius 30 cm. The focal length of the concave mirror is:
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Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
The diagram below shows the parallel rays incident on a convex mirror. C is the centre of the curvature of the mirror. By drawing the paths of the reflected rays, label the focus F and hence find the focal length of the mirror.
