A 1.5 cm tall candle flame is 2.0 m from the wall. You happen to have a lens wit
ID: 2077117 • Letter: A
Question
A 1.5 cm tall candle flame is 2.0 m from the wall. You happen to have a lens with a focal length of 18 cm.What are the distance between the candle and the lens for each location? Express your answer using three significant figures in ascending order separated by a comma. A 1.5 cm tall candle flame is 2.0 m from the wall. You happen to have a lens with a focal length of 18 cm.
What are the distance between the candle and the lens for each location? Express your answer using three significant figures in ascending order separated by a comma.
What are the distance between the candle and the lens for each location? Express your answer using three significant figures in ascending order separated by a comma.
Explanation / Answer
here,
the focal length , f = 18 cm
let the object disatnce and the image distance be do and di
using the lens formula
1/f = 1/di + 1/do
1/18 = 1/di + 1/do ....(1)
and
di + do = 200 ....(2)
from (1) and (2)
di = 20 cm and do = 180 cm
or
di = 180 cm and do = 20 cm
the distance between candle anf the lens can be 20 cm or 180 cm
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