A convex lens of focal length 20cm produces real image whose size is four times the size of the object. (i) Calculate the object and image distance. (ii) Calculate the height of the object if the height of the image is 6cm. (iii) Explain the properties of the image by drawing the ray diagram

An object is placed to the left of a lens, and a real image is formed to the right of the lens. The image is inverted relative to the object and is one-half the size of the object. The distance between the object and the image is 90 cm.Find a) how far from the lens the object is and b) the focal length of the lens. Should a diverging or converging lens be used to create the image? Explain.Note: Don't forget to draw an accurate ray diagram to verify that all the given and computed values for the object and image distances and heights and the focal lengths are correct.

12. An object is placed 21.4 cm to the left of a convex lens of focal length 15 cm. A second concave lens is placed 20 cm to the right of the convex lens and a final real, inverted image of the object is projected on a screen located 66.8 cm to the right of the concave lens. Calculate the focal length of the concave lens. Ans.: -55 cm

A 2.00-cm-tall object is 18.0 cm in front of a converging lens with a focal length of 32.0 cm. 1)Calculate the image distance dII. Follow the sign convention. (Express your answer to three significant figures.) 2)Calculate the image height hII. Follow the sign convention. (Express your answer to three significant figures.)

An 8.0 cm insect is in front of a converging lens with a focal length of 10 cm. Trace the image of the insect placed 25 cm from the lens and determine its: a) Type (real,virtual) b)Orientation (upright,inverted) c)Size ( enlarged, diminished, the same)

An object is placed 15 cm in front of a converging lens with a focal length of 10 cm. Answer the following. 2F F 2F a) What is object distance? b) What is the magnification of the image? c) Is the image upright or inverted?

An object is 19 cm in front of a diverging lens that has a focal length of -13 cm. How far in front of the lens should the object be placed so that the size of its image is reduced by a factor of 2.3? Number -18.98 Units cm

An image is located 346 mm behind a 204 mm focal length lens. A) Find the object distance. B) Find the magnification of the image. C) Is the image upright or inverted? factor of 4 or when you place it 8.0 cm behind a lens the

An object is placed at an object distance half the magnitude of the focal length of a converging lens. Which of the following is incorrect? Consider the magnitudes only. O di = 2do O M = +2 O h₁ = 0.5ho O di = f

Two 25.0-cm-focal-length converging lenses are placed 50.0 cm apart. An object is placed 30.0 cm in front of one lens. Where will the final image formed by the second lens be located relative to the second lens? What is the total magnification? Draw a ray diagram to help your calculations.