Advertisements
Advertisements
प्रश्न
Why does a light ray incident on a rectangular glass slab immersed in any medium emerges parallel to itself? Explain using a diagram.
उत्तर
Consider the diagram shown below in which EO is incident ray, OO' is refracted ray and O'H is emergent ray.
Here, AB is the air-glass interface and CD is the glass-air interface. The extent of bending of ray of light at opposite and parallel faces AB and CD of the rectangular glass slab is equal and opposite.
Here, angle i1 = r2 and angle r1 = i2
Hence, the ray emerges parallel to the incident ray.
APPEARS IN
संबंधित प्रश्न
Wirte down the letter C and I as seen in a plane mirror.
A light ray is incident normally on a plane mirror. (a) What is its angle of incidence?
Draw a diagram to show the reflection of a ray of light using a plane mirror. In the diagram, label the incident ray, the reflected ray, the normal, the angle of incidence and the angle of reflection.
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?
Why are infinite images not seen when two plane mirrors are facing each other?
State whether the following statement is true or false. If false, correct it.
The image formed in a plane mirror is the real, erect, and same size as that of the object.
State whether true or false. If false, correct the statement.
The reason for brilliance of diamonds is total internal reflection of light.
______ through which light can pass completely.
______ through which light cannot pass.
Plane mirrors are used as looking glass, to reflect light on objects and in periscopes.
