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NCERT Solutions Class 8 Science Solutions for Exercise in Chapter 16 - Light

Question 50 Exercise

(a) Find out the position of the image of an object situated at A in the plane mirror (Fig. 16.21).

(b) Can Paheli at B see this image?

(c) Can Boojho at C see this image?

(d) When Paheli moves from B to C, where does the image of A move?

Answer:

a) Image of an object placed at A is formed behind the mirror. The distance of the image from the mirror is equal to the distance of A from the mirror

b)Yes Paheli at B can see this image.

c) Yes Boojho at C can see this image.

d) Image of the object at A will not move. It will remain at the same position when Paheli moves from B to C.

Video transcript
"hello students my name is rabbit singh and i welcome you all to leader learning homework one of india's best online classes now today in this video we have a question that is based on the topic plane mirror the question says find out the position of the image of an object situated at a in the plane mirror you can see this is a and this is a plane mirror so let us label it as plane mirror now figure 16.21 you can see this is figure 16.21 now question says first one you have to find the position of the image of an object situated at a in the plane mirror so what will be the position of the image so you can see image if an object placed at a is formed behind the mirror where it will be formed it will be formed behind the mirror why it will be formed behind the mirror because in a plane mirror sign convention states object distance is always equal to the object distance is always equal to the image distance so we will apply that concept so if this is here this will also be here so the distance of the image from the mirror is equal to the distance of a from the mirror so whatever with this distance same distance will be there for a so object distance is equal to image distance so first answer is that now b point can bahili at b see this image now bahili is at point b so can bahili at b see this image so answer will be yes we can see this image because in a plane mirror the images are made that are virtual and erect third can boojo at c see this image so this is boojo so answer for this one also will be yes bujo ads you can see this image now when pahili moves from b to c so like let us change the color if bahili is moving from b to c where does the image of a move so image of object at a will not move it will remain at the same position when bahili moves from b to c because they are interchanging their position but a remains as it is so there will be no change in the position of a so there will be no change in the position of a because a has not moved so answer will be a has not moved so it will remain at the same position when he moves from b to c like when h3 is moving from b to c so i hope you have understood the concept very clearly but still if you have any doubt do comment in the comment box and please like and subscribe our channel for lido thank you "
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