Question

please answer the question please friends

Answer 1

which question bro 4 or 5

Answer 2

(iv) We've been given u=-7.5cm, f=6cm

1/f = 1/v + 1/u

Find v from here and that'll be your image distance.

(v) hi/ho = -v/u

hi = image height
ho = object height
you know what u and v are...

From the above formula write v in terms of u and then substitute it into

1/f = 1/u + 1/v to get u which is what we need.

hope you've understood it all.

Godspeed!!