Physics, asked by siddhant8671, 9 months ago

a concave lens of focal length one metre is placed at a distance of 1 metres from an object where and at what distance will the image be formed​

Answers

Answered by Anonymous
10

Answer:

\large\boxed{\sf{-0.5\;m}}

Explanation:

Given, a concave lens.

We know that , focus of the concave lens lies on the left side of optical center.

Therefore, we have,

  • focal length, f = - 1 m

Also, Object is placed on left side of the optical centre

Therefore, we have,

  • Object distance, u = - 1 m

Now, let the image distance is ‘v’

By lens formula, we get,

  \large \boxed{ \red{\frac{1}{v}  -  \frac{1}{u}  =  \frac{1}{f} }}

Putting the respective values, we get,

 =  >  \frac{1}{v}  -  \frac{1}{( -1 )}  =  \frac{1}{( - 1)}  \\  \\  =   >  \frac{1}{v}   + 1=  - 1 \\  \\  =  >  \frac{1}{v}  =  - 1 - 1 \\  \\  =  >  \frac{1}{v}  =  - 2 \\  \\  =  > \sf{ v =  \frac{ - 1}{2}  \: m}

°.° Image distance is negative

.°. Image will be formed to the left side of the optical centre at a distance of 0.5 m from optical center towards left side.

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