Focal length of convex lens 20cm . an object is kept at a distance by 10cm from it find the position of the image after refraction though it. Draw a ray diagram to explain the image formation.
Answers
Answered by
5
You just need to find v .
f=20,u=-10 , now using lens formula
1/f=1/v-1/u
1/20=1/v-(-1/10)
1/20=1/v+1/10
1/20-1/10=1/v
1-2/20=1/v
-1/20=1/v
v=-20
now you are having image dist., object dist. and focal length. use scaling and scale 1cm=2cm and draw the ray diagram to show the image formation.
f=20,u=-10 , now using lens formula
1/f=1/v-1/u
1/20=1/v-(-1/10)
1/20=1/v+1/10
1/20-1/10=1/v
1-2/20=1/v
-1/20=1/v
v=-20
now you are having image dist., object dist. and focal length. use scaling and scale 1cm=2cm and draw the ray diagram to show the image formation.
Similar questions