Optics Answers

Two lenses, one converging with focal length 20.0 cm and one diverging with focal length -10.0 cm are placed 25.0 cm apart. An object is placed 60.0 cm in front of the converging lens. Determine (a) the position and (b) the magnification of the final image formed. (c) Sketch a ray diagram for this system.

A diverging lens with f = –36.5 cm is placed 14.0 cm behind a converging lens with f = 20 cm. Where will an object at infinity be focused?

A stamp collector uses a converging lens with focal length 28 cm to view a stamp 16 cm in front of the lens. (a)Where is the image located? (b) What is the magnification?

  A sharp image is located 391 mm behind a 215-mm focal- length converging lens. Find the object distance (a) using a ray diagram, (b) by calculation.

 1. A convex mirror has a focal length of -0.90 m. An object with a height of 0.40 m is 2.5 m from the mirror. a) Calculate the image distance b) Calculate the image height.

A long clothesline is stretched horizontally between two trees. While shaking this clothesline up and down near one end at the rate of 4 cycles per second, the wavelength is 1m. What is the speed of these waves? If the distant end is 10m apart how long does a wave pulse take to return to you

What will happen to the parameters of an optical fiber, when it is submerged into water i) numerical aperture and ii) acceptance angle?

A convex lens of focal length 6cm is at distance of 10cm from a screen placed at right angles to axis of lens.A diversing lens of 12cm focal length is palced co-axial between convex lens and screen so that image of object at 24cm from convex lens is formed on secm.The distance between them?

. Ashman pulls a 4.5 kg bucket of water from a well of 2.8 m depth by a rope. Draw a labeled free-body diagram of the bucket and find the magnitude of tension force in the rope if the upward acceleration of the bucket is 1/4 gram.

Find the formula for the focal length of a thin lens if the R₂ radius of curvature

of the lens surface is k times more than R₁ radius of curvature and the refraction index of

the lens is n = 2. The medium surrounding the lens is air.