Advertisements
Advertisements
प्रश्न
A small hole P is made in a piece of cardboard. The hole is illuminated by a torch as shown in the following figure. The pencil of light coming out of the hole falls on a mirror.
At which point should the eye be placed, so that the hole can be seen?
विकल्प
A
B
C
D
Advertisements
उत्तर
A
Explanation:
Eye should be placed at A because the hole can be seen only, when the angle of incidence is equal to the angle of reflection.
APPEARS IN
संबंधित प्रश्न
Write true or false of the following statement.
The image formed by a plane mirror is upright.
Write true or false of the following statement.
The objects are seen around us due to irregular reflection of light.
Select the correct alternative
The angle of incidence on a plane mirror is 30°.The angle of reflection will be:
In the following diagrams, measure and write the angle of incidence and draw the reflected ray in each case.
State in words, how do you find the location of image of an object formed by a plane mirror.
Define the following term
Angle of incidence
We can see a non-luminous object when the light
Two mirrors A and B are placed at right angles to each other as shown in the following figure.
A ray of light incident on mirror A at an angle of 25° falls on mirror B after reflection. The angle of reflection for the ray reflected from mirror B would be
Angle of incidence is greater than the angle of reflection.
A ray of light fall on a plane surface at an angle of incidence of 9° and reflection occurs. Calculate the angle of reflection in degree.
