Question

If an object is placed 10 cm infront of a concave mirror of focal length 20 cm, the image will be
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Answer 1

Answer:

I hope it is the correct explanation for your ans

Answer 2

Answer:

• Image distance is 20 cm behind the mirror .

Given:-

• Object Distance ,u = -10 cm
• Focal length ,f = -20 cm

To Find:-

• Image distance is 20 cm in front of mirror .

Solution:-

As we have to calculate the image distance

Using Mirror Formula

• 1/v + 1/u = 1/f

where,

• v is the Image Position
• u is the object distance
• f is the focal length

Substitute the value we get

→ 1/v = 1/f - 1/u

→ 1/v = -1/20 + 1/10

→ 1/v = -1+2/20

→ 1/v = 1/20

→ v = 20 cm

• Hence, the image distance is 20 cm behind the mirror .