Question

V=10cm u=10cm find the focal length discuss the type of mirror

Answer 1

FORMULA USED ....
$1 \div v + 1 \div u = 1 \div f$
so
v= 10 cm
u= 10 cm

put in formula we get ____


$1 \div 10 + 1 \div 10 = 1 \div f$

$2 \div 10 = 1 \div f$
$f = 10 \div 2$
$f = 5cm$

Answer 2

if v = 10cm

it means it is a covex mirror

so

1/v + 1/u = 1/f

1/10 + 1/10

=2/10=1/5

5/1 = f/1

5 = f