An object 3.0cm high is placed 60.0cm from a converging lens whose focal length is 20.0cm. Calculate the size of the image formed

Sheisawesomedurhhh

1 year ago

@myschool your formula is wrong na

its height of image÷height of object

NOT

height of object÷ height of image

Avnie

2 years ago

u=60,v=?, f=20 , hu=3,hv=?
1/f=1/u+1/v
1/20=1/60+1/v (take 1/60 to the other side)
1/20 -1/60=1/v
The lcm=60. So...
1/v=3-1/60 =2/60
1/v=1/30 (cross multiply)
v=30
We can now use this formula
u/v=hu/hv
60/30=3/hv
2/1=3/hv
Cross multiply
2hv=3
hv=3/2
hv=1.5
(Option B)

Laze

1 year ago

Ur formula is not following what I have in the textbook wrong. It’s always image/object

AVAZ

4 years ago

The answer is 2.0
M=v/u and not u/v.😉

Sammyporsche123

3 years ago

my school the answer is 6 plz review