If the rays from sun converge at distance 12cm in front of a concave m

1.	If the rays from sun converge at distance 12cm in front of a concave mirror. 1 poirWhere should an object be placed so that the size of its image is equal tothat of the object? *12cm in front of the mirrorbetween 12cm and 6 cm in front of the mirror24cm in front of the mirror6cm in front of the mirror
Answer» Explanation: Since sun is an object at infinity, its IMAGE will fall athe focus. So the focal length can be taken as - 12 cm. Let US CONSIDER the object distance as x from pole. Since image and object distance is same, take it also as x. According to the equation, 1/v + 1/u =1/f 1/x+1/x=1/f 2/x =1/f So, x=f/2 Therefore, u= - 6 cm So it *should* be *placed* *6cm* *INFRONT* of *the* *concave* *mirror*.

If the rays from sun converge at distance 12cm in front of a concave mirror. 1 poirWhere should an object be placed so that the size of its image is equal tothat of the object? *12cm in front of the mirrorbetween 12cm and 6 cm in front of the mirror24cm in front of the mirror6cm in front of the mirror

Answer»

Explanation:

Since sun is an object at infinity, its IMAGE will fall athe focus.

So the focal length can be taken as - 12 cm.

Let US CONSIDER the object distance as x from pole.

Since image and object distance is same, take it also as x.

According to the equation,

1/v + 1/u =1/f

1/x+1/x=1/f

2/x =1/f

So, x=f/2

Therefore, u= - 6 cm

So it should be placed 6cm INFRONT of the concave mirror.