Question

power of The lens is-40,its focal lens is

Answer 1

ᴴᴱᴸᴸᴼ ᶠᴿᴵᴱᴺᴰ

ᴳᴼᴼᴰ ᴹᴼᴿᴺᴵᴺᴳ

ᵞᴼᵁᴿ ˢᴼᴸᵁᵀᴵᴼᴺ ᴵˢ ᴳᴵᵛᴱᴺ ᴮᴱᴸᴼᵂ

ᵂᴱ ᴷᴺᴼᵂ ᵀᴴᴬᵀ,

$= > power = \frac{1}{f} \\ = > - 40 = \frac{1}{f} \\ = > f = - 0.025 \: m$
ᵀᴴᴵˢ ᴵˢ ˢᴬᵀᴵˢᶠᴬᶜᵀᴼᴿᵞ ᵀᴼ ᵞᴼᵁ

ᵀᴴᴬᴺᴷˢ

ᴴᴬᵛᴱ ᴬ ᴳᴼᴼᴰ ᴰᴬᵞ ᶠᴿᴵᴱᴺᴰ

❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤

Answer 2

Given :-

• Power of lens is - 40 D

To Find :-

• Focal length

Answer :-

• F = 1/D

=> F = 1/ (-40)

=> F = - 0.025m