Advertisements
Advertisements
प्रश्न
Which of the following can make a parallel beam of light when light from a point source is incident on it?
विकल्प
Concave mirror as well as convex lens
Convex mirror as well as concave lens
Two plane mirrors placed at 90° to each other
Concave mirror as well as concave lens
Advertisements
उत्तर
Concave mirror as well as convex lens
Explanation -
When the point source is kept at the focus of the concave mirror and convex lens, the light rays after reflection and refraction respectively, will become parallel to the principal axis.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
A plane mirror _________ reflects 100 percent light falling on it.
With the help of diagrams, explain the difference between the regular and irregular reflection.
A light ray is incident normally on a plane mirror. (a) What is its angle of incidence?
What do you understand by the Light?
Write down four characteristics of image formed in a plane mirror.
Describe the principle of simple periscope through an outline ray diagram. Give one of its uses.
What is a real image?
State whether the following statement is true or false. If false, correct it.
If a ray of light incident on a plane mirror is such that it makes an angle of 30o with the mirror, then the angle of reflection is 60o.
By geometrical construction, find the position of the image in the following figure.
Find the odd one.
sun, candle, torch, pen
An object that blocks all of the light from passing through is ______.
______ through which light cannot pass.
Plane mirrors are used as looking glass, to reflect light on objects and in periscopes.
A point source of light S is placed in front of two large mirrors as shown. Which of the following observers will see only one image of S?
