Question

a candle is kept at a distance of 4 feet away from a plane mirror. at which distance the image of the candle can be obtained

Answer 1

Hey there!

Following are the cases in a Plane Mirror:

1. Object distance = Image distance
That is,

u = v

2. Height of Object = Height of Image
That is,

Hi = H°

3. Magnification is always 1
That is,

m = 1

4. The Image formed will be Virtual, Erect and Same sized

Therefore, according to ur question...
The Image of candle will be obtained at a distance of 4 Feet (from pole of the mirror)
& 8 Feet (from the place where candle is kept)

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Answer 2

4 feet is the answer