Question

point object is placed at a distance of 20 cm from a convex mirror of focal length 20 cm. The image will form at:

1) at infinity

2) at focus

3) at the pole

4) can have any value
please ans fast​

Answer 1

Answer:

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Answer 2

$\huge \text{Answer }$

➜  image distance from mirror is 10 cm .

$\huge \text{Solution:}$

➜ ★ Given ;

Object Distance ( U ) = -20 cm

Focal length of Convex mirror ( F ) = + 20 cm

Image distance ( V ) = ???

----------------------------------- [ BY MIRROR FORMULA ] ------------------------------------

1 / V + 1 / U = 1 / F

» 1 / V + [ - ( 1 / 20 ) ] = + ( 1 / 20 )

» 1 / V = ( 1 / 20 ) + ( 1 / 20 )

» 1 / V = 2 / 20

★ V = + 10 cm

ANSWER :- hence ; image distance from mirror is 10 cm .