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प्रश्न
Which are the two convenient rays that are chosen to construct the image by a spherical mirror for a given object? Explain with the help of suitable ray diagrams.
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उत्तर
Two convenient rays that are chosen to construct the image by a spherical mirror for a given object :
- A ray passing through the centre of curvature: A ray of light passing through the centre of curvature of a concave mirror or a ray directed in the direction of the centre of curvature of a convex mirror is reflected back along the same path after reflection.
- A ray parallel to the principal axis: A ray of light parallel the principal axis, after reflection pass through the principal focus in case of a concave mirror or appears to diverge from it in case of a convex mirror.
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संबंधित प्रश्न
We can obtain a real, enlarged and inverted image by a concave mirror.
Give one use each of a concave and a convex mirror.
Name the two types of spherical mirrors. What type of mirror is represented by the:
- back side of a shining steel spoon?
- front side of a shining steel spoon?
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?
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.
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.
Define the following term:
convex mirror
Geometric centre of the spherical mirror is ______.
The distance from the center of curvature of the mirror to the pole is called the focal length of the mirror.
