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प्रश्न
Define the Focal length of a spherical mirror
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उत्तर
The distance between the pole and the focus is called focal length of the mirror. It is measured in meter or cm.
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संबंधित प्रश्न
Explain the following term related to spherical lenses:- optical centre
We can obtain a real, enlarged and inverted image by a concave mirror.
Which type of mirror can form a real image?
What do you understand by the focus and focal length of a spherical mirror? Show them on the separate diagrams for each of a concave mirror and a convex mirror.
Name the two kinds of spherical mirrors and distinguish between them.
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.
Name the kind of mirror used to obtain:
A virtual and enlarged image
State the kind of mirror used
(a) By a dentist,
(b) As a search-light reflector.
An object 5 cm high is placed at a distance 60 cm in front of a concave mirror of focal length 10 cm. Find the position and size of the image.
An object forms a virtual image which is 1/8th of the size of the object. If the object is placed at a distance of 40 cm from the convex mirror, calculate:
- the position of the image
- the focal length of the convex mirror.
Draw a ray diagram to show that a convex mirror has a wider field of view.
Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
Spherical mirrors are one form of ______ mirrors.
In normal adjustment, for a refracting telescope, the distance between objective and eye piece is 30 cm. The focal length of the objective, when the angular magnification of the telescope is 2, will be ______.
Define the following terms in the context of a diverging mirror:
- Principal focus
- Focal length
Draw a labelled ray diagram to illustrate your answer.
