If light from a source that is at an infinite distance from the lens forms an image at a distance of 0.26 m from the centre of the lens, what is the focal length of this lens? Give your answer to 2 decimal places

The light source is 0.27 m from the lens. The screen is moved to a distance of 0.11 m from the centre of the lens so an image of the light source is seen at the screen.Calculate the focal length of the lens. Express answer to three decimal places,use SI units.

What is the focal length of a lens that produces a real image three times as large as theobject if the distance between image and the object is 1 m?

A lens has a refractive power of −1.50 D. What is its focal length?

An object is placed 65.7 cm from a converging lens that has a focal length of 24.6 cm. Determine the image distance. Enter a – answer if appropriate.Image DistancecmInfoAttempts: 0/∞SubmitDetermine the magnification of this image. Enter a – answer if appropriate.

The graph shows how the magnification m produced by a thin lens varies with image distance v. What is the focal length of the lens used?