Advertisements
Advertisements
प्रश्न
When an object of height 1 cm is kept at a distance 4 cm from a concave mirror, its erect image of height 1.5 cm is formed at a distance 6 cm behind the mirror. Find the focal length of mirror, by drawing.
Advertisements
उत्तर
A ray passing parallel to the principal axis passes through the focal point after reflection. Hence, the focal length is 12 cm.
APPEARS IN
संबंधित प्रश्न
A ray of light is incident normally on a plane mirror. What will be the
angle of incidence?
What type of image is formed:
on a cinema screen?
Define (a) centre of curvature (b) radius of curvature (c) pole (d) principal axis, and (e) aperture, of a spherical mirror with the help of a labelled diagram
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.
Draw suitable diagrams to illustrate the action of (i) concave mirror and (ii) convex mirror on a beam of light incident parallel to the principal axis.
Write the spherical mirror's formula and explain the meaning of each symbol used in it.
A real and enlarged image can be obtained by using a
Is real image always inverted?
Which of the following has curved reflecting surface?
