Advertisements
Advertisements
Question
Match the following.
| Convex mirror | Radio telescopes |
| Parobolic mirror | Rear – view mirror |
| Snell’s law | Kaleidoscope |
| Dispersion of light | sin i/sin r =μ |
| Refractive index | Rainbow |
Advertisements
Solution
| Convex mirror | Rear – view mirror |
| Parobolic mirror | Radio telescopes |
| Snell’s law | sin i/sin r =μ |
| Dispersion of light | Rainbow |
| Refractive index | Kaleidoscope |
APPEARS IN
RELATED QUESTIONS
It is desired to obtain an erect image of an object, using concave mirror of focal length of 12 cm.
Where will the image of this object be, if it is placed 24 cm in front of the mirror? Draw ray diagram for this situation also justify your answer. Show the positions of pole, principal focus and the centre of curvature in the above ray diagrams
Copy this figure in your answer book and show the direction of the light ray after reflection:
Draw the following diagram in your answer book and show the formation of image with the help of suitable rays:
Between which two points of concave mirror should an object be placed to obtain a magnification of:
(a) −3
(b) +25
(c) −0.4
With the help of a labelled diagram, explain how a concave lens diverges a beam of parallel light rays. Mark the principal axis, optical centre, principal focus and focal length of the concave lens on the diagram.
Suppose you have three concave mirrors A, B and C of focal lengths 10 cm, 15 cm and 20 cm. For each concave mirror you perform the experiment of image formation for three values of object distance of 10 cm, 20 cm and 30 cm. Giving reason answer the following:
(a) For the three object distances, identify the mirror/mirrors which will form an image of magnification – 1.
(b) Out of the three mirrors identify the mirror which would be preferred to be used for shaving purposes/makeup.
(c) For the mirror B draw ray diagram for image formation for object distances 10 cm and 20 cm.
Draw the ray diagram and also state the position, the relative size and the nature of image formed by a concave mirror when the object is placed at the centre of curvature of the mirror.
According to cartesion sign convention, which mirror and which lens has negative focal length?
Concave mirrors are used by dentists to examine teeth. Why?
State whether the following statement is True or False.
The sides of an object and its image formed by a concave mirror are always interchanged
