Question

plz help me
The radius of curvature of a certain concave mirror is 20cm . What is the magnitude of its focal length .
plz solve it fasttttttt

Answer 1

Using the formula f=R/2, we can get the answer.

R=20 cm

Therefore f=20/2=10 cm

Since the focal length of a concave mirror is positive, let's leave it as it is.

Hope it helps u

Answer 2

hi sis.....

here is ur answer...

R=(20cm)....

. focal length (f)=R½

f=(20×½)

f=(10cm...)✔✔✔

hence...

✨magnitude of focal length is 10 cm✨

hope it helps...☺☺
please mark it as brainliest..✌✌

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