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प्रश्न
Define the term Centre of curvature.
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उत्तर
Centre of curvature is the centre of the imaginary sphere to which the mirror belongs.
संबंधित प्रश्न
A diverging lens is used in:
(a) a magnifying glass
(b) a car to see objects on rear side
(c) spectacles for the correction of short sight
(d) a simple camera
State the types of mirrors used for (i) headlights and (ii) rear view mirror, in cars and motorcycles. Give to justify your answer in each case.
Complete the following diagrams shown in Fig. by drawing the reflected ray for each of the incident ray A and B.
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.
The image formed by a convex mirror is
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?
Select the correct option:
Which mirror is used in periscope?
What is the relationship between the focal length and radius of curvature?
Define the term Normal.
The following Figure shows a concave mirror MM' on which a ray of light incident from a point P gets reflected to meet the principle axis at O.
(a) Find, by construction, the position of the centre of curvature of the concave mirror.
(b) Write down the value for the radius of curvature of the mirror.
(c) Calculate the focal length of the mirror.
(d ) Which relation is used in deducing the focal length from the radius of curvature?
