Question

One side of a lens is concave with the radius of curvature of 25cm, and the...

One side of a lens is concave with the radius of curvature of 25cm, and the other side is flat. The lens is made of glass with index of refraction of 1.5. Find the focal power of the lens? What is the type of lens (coverging or diverging)?

Homework Answers

Answer #1

Using lens maker equation, focal length of the lens

n = 1.5

R1 = - 25 (concave side)

R2 = infinite (plane side)

Hence f = - 50 cm

As the focal length is negative, it is diverging lens.

Kindly rate.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The radius of the curvature of one of the surfaces of a biconvex lens is 5...
The radius of the curvature of one of the surfaces of a biconvex lens is 5 times superior to the other radius on the other side. the lens is made of glass with a refraction index of 1.53, the power is 5D. Determine the radius of curvature on both sides. I used the equation of the Lensmaker's Equation for a Thick Lens, but i cant match the answer give, which is R1=12,7mm and R2=-63,5mm.
A plastic plano-concave lens has a radius of curvature of 58 cm for its concave surface....
A plastic plano-concave lens has a radius of curvature of 58 cm for its concave surface. If the index of refraction of the plastic is 1.25, what is the power of the lens?
A converging lens is made using glass with index 1.5. The desired focal length is 60...
A converging lens is made using glass with index 1.5. The desired focal length is 60 cm. If one side of the lens is convex with radius of curvature 20 cm, how should the other side be made?
A lens with outer radius of curvature R and index of refraction n rests on a...
A lens with outer radius of curvature R and index of refraction n rests on a flat glass plate, and the combination is illuminated from white light from above. Is there a dark spot or a light spot at the center of the lens? a dark spot a light spot What does it mean if the observed rings are noncircular?
A single bi-concave lens (a lens with two concave surfaces) made of glass (index of refraction...
A single bi-concave lens (a lens with two concave surfaces) made of glass (index of refraction n = 1.55) has surfaces with radii of curvature r1 = -19.0 cm and r2 = 19.0 cm. What is the focal length of the lens in air? I got 17.32cm as the correct answer. Dont know the other two. If an object is placed at p = 20.0 cm from the lens, where is the image? (Use a positive sign for a real...
The lens will sit 60 m away from a building and tower 40 m above its...
The lens will sit 60 m away from a building and tower 40 m above its roof. Only one side will of the lens is spherical . The other side will be flat. The glass will have an index of 1.5. What radius of curvature in m is needed to focus the suns rays onto the building?
Rays pass through a semi-circular, plano-convex lens with a radius of curvature of 7.62 cm. As...
Rays pass through a semi-circular, plano-convex lens with a radius of curvature of 7.62 cm. As light rays incident on the flat side of the lens and exit through the circular side, a ray incident along a line parallel to the axis of the lens is 2.00 cm above or below that axis would converge to a focus 18.90 cm from the geometric center of the lens. What is the effective index of refraction for the material the lens is...
A thin lens is made of glass that has refractive index n = 1.50. The lens...
A thin lens is made of glass that has refractive index n = 1.50. The lens is surrounded by air. The left-hand spherical surface of the lens is concave with radius of curvature R and the right-hand side is flat, so the lens is thinner in the middle than at its edges. An object is placed 12.0 cm to the left of the center of the lens. What is the value of R if the image formed by the lens...
A single bi-concave lens (a lens with two concave surfaces) made of fused quartz (index of...
A single bi-concave lens (a lens with two concave surfaces) made of fused quartz (index of refraction n = 1.46) has surfaces with radii of curvature r1 = -27.0 cm and r2 = 27.0 cm. a)What is the focal length of the lens in air? b)If an object is placed at p = 14.0 cm from the lens, where is the image? (Use a positive sign for a real image or a minus sign for a virtual image.) c)If the...
a) A single bi-concave lens (a lens with two concave surfaces) made of fused quartz (index...
a) A single bi-concave lens (a lens with two concave surfaces) made of fused quartz (index of refraction n = 1.46) has surfaces with radii of curvature r1 = -12.0 cm and r2 = 12.0 cm. What is the focal length of the lens in air? b) If an object is placed at p = 20.0 cm from the lens, where is the image? (Use a positive sign for a real image or a minus sign for a virtual image.)...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT