Question

a concave mirror produces two times magnified virtual image of an object placed at 15 CM in front of it find the position of the image

Answer 1

1

rahul648

rahul648

16.05.2018

Physics

Secondary School

+5 pts

Answered

A concave mirror produce two times magnified real image of an object placed at 10cm in front of it. find the position of the image

2

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Answers

karantuli

karantuli Helping Hand

u -10

m -2

-v/u equal to -2

v/u 2

v 2u 2 (-10) -20

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Comments (7) Report

rahul648

here real image is given so minus sign would not be included

karantuli

so real image has always negative sign

rahul648

why you have taken m -2

karantuli

you have statement that mirror produce 2 times magnified image

karantuli

and it is real

karantuli

I use negative sign

karantuli

now you understand

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shirleywashington Ambitious

Answer : The image is formed at a distance of 20 cm.

Explanation :

Given that a concave mirror produce two times magnified real image of an object.

Object distance, u = 10 cm

The magnification of a concave mirror is given by :

m=\dfrac{-v}{u}

For real image, m = -2

So,

-2=\dfrac{-v}{10\ cm}

v = 20 cm

The image is formed at a distance of 20 cm.

Hence, this is the required solution.

Answer 2

Answer:

m=+12

u=15

v=?

m=(v/u)

+2=(v/-15)

-30=-v

v=30

Explanation:

just doing it 1 day before my exam and it is right