Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between David and his image will be ______.
Write true or false of the following statement.
The image of the right hand in a plane mirror looks like that of a left hand.
The perpendicular to the mirror at the point of incidence is called ______.
A light ray is incident normally on a plane mirror. What is the direction of reflected ray? Show it on a diagram.
The diagram in Figure shows a point object P in front of a plane mirror MM1.
(a) Complete the diagram by taking two rays from the point P to show the formation of its image.
(b) In the diagram, mark the position of eye to see the image.
(c) Is the image formed real or virtual? Explain why?
Describe the principle of simple periscope through an outline ray diagram. Give one of its uses.
An object 3 cm high produces a real image 4.5 cm high when placed at a distance of 20 cm from a concave mirror. Calculate:
- the position of image
- focal length of the concave mirror.
An object 1.5 cm high when placed in front of a concave. the mirror produces a virtual image 3 cm high. If the object is placed at a distance of 6 cm from the pole of the mirror, calculate:
- the position of the image
- the focal length of the mirror.
Which of the following ray diagrams is correct for the ray of light incident on a lens shown in figure?
 |
 |
| A | B |
 |
 |
| C | D |
Total internal reflection will occur if the angle of reflection is ______.
