Physics, asked by missPAVI, 10 months ago

A 10mm long awl pin is placed vertically in front of a concave mirrior.A 5mm long image of the awl pin is formed at 30cm in front of the mirror. What is the focal length of the mirror????​

Answers

Answered by Brainly5Hero5Sumit
2

Answer:

Answer:Apply the relation - (v / u) = m = hi / ho as

Answer:Apply the relation - (v / u) = m = hi / ho as= (- 5) / 10 = - {(- 30) / u}

Answer:Apply the relation - (v / u) = m = hi / ho as= (- 5) / 10 = - {(- 30) / u}=u = - 60 cm

Answer:Apply the relation - (v / u) = m = hi / ho as= (- 5) / 10 = - {(- 30) / u}=u = - 60 cmApply mirror formula as

Answer:Apply the relation - (v / u) = m = hi / ho as= (- 5) / 10 = - {(- 30) / u}=u = - 60 cmApply mirror formula as= (1 / v) + (1 / u)= 1 / f

Answer:Apply the relation - (v / u) = m = hi / ho as= (- 5) / 10 = - {(- 30) / u}=u = - 60 cmApply mirror formula as= (1 / v) + (1 / u)= 1 / f= 1 / (- 60) + 1 / (- 30)= 1 / f

Answer:Apply the relation - (v / u) = m = hi / ho as= (- 5) / 10 = - {(- 30) / u}=u = - 60 cmApply mirror formula as= (1 / v) + (1 / u)= 1 / f= 1 / (- 60) + 1 / (- 30)= 1 / f= 1 / (- 20) = 1 / f or f = - 20 cm

Answer:Apply the relation - (v / u) = m = hi / ho as= (- 5) / 10 = - {(- 30) / u}=u = - 60 cmApply mirror formula as= (1 / v) + (1 / u)= 1 / f= 1 / (- 60) + 1 / (- 30)= 1 / f= 1 / (- 20) = 1 / f or f = - 20 cmHence , the correct choice is b) -20 cm. The (-) ve sign indicates that the focal length lies in front of the mirror.

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