Science, asked by pratikbhati874, 8 months ago

the power of a lens is -1.5 diopter find its focal length​

Answers

Answered by rudraaggarwal239982
9

Answer:

HERE IS YOUR ANSWER MATE...

Explanation:

DIAMETER OF LENS=  -1.5

focal length​=2

Answered by Yugant1913
22

Answer:

\huge\sf\mathbb\color{yellow} \underline{\colorbox{purple}{☠answer☠}}

Explanation:

Given.

  • P = - 1.5 D

To Find

  • Focal length

Solution

  • We have formula

☛ \:  \:  \:  \: p =  \frac{1}{ƒ}  \\

  • (p) = power
  • (ƒ) =focal length

Now, we putting given value

p =  \frac{1}{ƒ}  \\

⟹ \:  \:  \:  - 1.5 =  \frac{1}{ƒ}  \\

⟹ \:  \:  \:  \:  \: ƒ =  \frac{1}{ - 1.5}  \\

⟹ \:  \:  \:  \:  \: ƒ =  -  \frac{100 \times 10}{15}  \\

⟹ \:  \:  \:  \:  \: ƒ =   - \frac{100 \times 2}{3}  \\

⟹ \:  \:  \:  \:  \: ƒ = -   \frac{  200}{3}  \\

 \:  \:  \:  \: ⟹ \:  \:  \:  \:  \:  \: ƒ =  - 66.7cm \:

Therefore, the value of focal length be - 66.7 cm

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