-2 points SepSE9 36 P041\'i My Notes Ask Your Teache The projection lens in a ce

Question

-2 points SepSE9 36 P041'i My Notes Ask Your Teache The projection lens in a certain slide projector is a single thin lens. A slide 25.0 mm high is to be projected so that its image fils a screen 1.89 m high. The slide-to-screen distance is 2.93 m. (a) Determine the focal length of the projection lens. (b) How far from the slide should the lens of the projector be placed to form the image on the screen? Need Help?Rwwh -1 points SerPSE9 36.P043 W My Notes Ask Your Teacha Your Teache A contact lens is made of plastic with an index of refraction of 1.40. The lens has an outer radius of curvature of +2.02 cm and an inner radiu of curvature of +2.60 cm. What is the focal length of the lens? cm Need Help? Wash

Explanation / Answer

here,

let the image distance be di and the object disatnce be do

di/do = 189/25 ...(1)

and

di + do = 2.93 ....(2)

from (1) and (2)

do = 0.34 m, di = 2.58 m

a)

let the focal length be f

1/f = 1/di + 1/do

1/f = 1/2.72 + 1/0.2

f = 0.19 m = 186 mm

b)

the lens should be placed 0.34 m from the slide

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.