Question

A concave mirror produces a real image 10 mm tall, of an object 2.4 mm tall placed at 5 cm from the mirror. Calculate the focal length of the mirror and the position of the image​

Answer 1

Answer:

i have taken  height as 2.5mm

Explanation:

Answer :

−4cm;−20cm

Solution :

Here, h2=−10mm,h1=2.5mm,u=−5cm,f=?,v=?

As m=h2h1=−vu,−102.5=−v−5orv=−20cm

Negative sign of v shows that image is real.

1f=1v+1u=1−20−15=−1−420orf=−205=−4cm.