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प्रश्न
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.
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उत्तर
FOCUS: For concave mirror
“A point on the principal axis at which the light rays incident parallel to the principal axis meet after reflection from the mirror.
FOCAL LENGTH: “The distance between focus and pole”. FP is focal length for a concave mirror.
FOCUS: For Convex mirror
“A point on its principal axis at which the light rays incident parallel to the principal axis appear to meet after reflection from the mirror”.
FOCAL LENGTH: “The distance between P and F is F.L.”
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संबंधित प्रश्न
Name the spherical mirror which can produce a real and diminished image of an object.
What is a spherical mirror?
State whether the image in part (a) is real or virtual?
Name the kind of mirror used to obtain:
A virtual and enlarged image
An object of length 4 cm is placed in front of a concave mirror at distance 30 cm. The focal length of mirror is 15 cm.
- Where will the image form?
- What will be the length of image?
Define the term principal focus in case of convex mirror. Draw a convex mirror and show its principal focus and focal length clearly.
What is the relation between focal length and radius of curvature of a concave mirror?
Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
The spherical mirror with a reflecting surface curved inward is called
Name the type of mirror used in the following situation:
Side/rear-view mirror of a vehicle
Support your answer with reason.
