Question

please answer the question properly no spams alloweded.focal length -20​

Answer 1

Explanation:

f = -20cm

u = -10cm

v = ?

(b) 1/f = 1/v+1/u

-1/20 = 1/v-1/10

1/v = -1/20+1/10

1/v = -1+2/20

1/v = 1/20

v = 20cm

Image distance = 20cm

(c) m = -v/u

= -20/-10

m = 2

Image is virtual, erect and enlarged

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Answer 2

Answer:

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