Owoc 0 C.A Q.3. The image of a candle flame placed at a distanceof 30

1.	Owoc 0 C.A Q.3. The image of a candle flame placed at a distanceof 30 cm from a mirror is formed on a screenplaced in front of the mirror at a distance of60 cm from its pole. What is the nature of themirror ? Find its focal length. If the height ofthe flame is 2.4 cm, find the height of its image.State whether the image formed is erect orinverted.[Delhi 31/1/3 2017
Answer» The distance of the OBJECT from the mirror, u = -30 cm The distance of the image from the mirror, v = -60 cm To find the foca LENGTH, we will USE the formula: Since, the focal length is negative, the nature of the mirror is convex i.e. it is a diverging mirror. The focal length of the mirror is = -20 cm The height of the flame = 2.4 cm The height of its image would be: Thus, the height of the image would be 4.8 cm. The image would be real and INVERTED.

Owoc 0 C.A Q.3. The image of a candle flame placed at a distanceof 30 cm from a mirror is formed on a screenplaced in front of the mirror at a distance of60 cm from its pole. What is the nature of themirror ? Find its focal length. If the height ofthe flame is 2.4 cm, find the height of its image.State whether the image formed is erect orinverted.[Delhi 31/1/3 2017

Answer»

The distance of the OBJECT from the mirror, u = -30 cm

The distance of the image from the mirror, v = -60 cm

To find the foca LENGTH, we will USE the formula:

Since, the focal length is negative, the nature of the mirror is convex i.e. it is a diverging mirror.

The focal length of the mirror is = -20 cm

The height of the flame = 2.4 cm

The height of its image would be:

Thus, the height of the image would be 4.8 cm.

The image would be real and INVERTED.

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