The image of a tree on a 35 mm color slide is 1.8 mm high. It is to be projected onto a screen 3.0 m from the slide and is to appear 493 mm high. What focal length is needed?
Given an object height of 3 cm and a convex lens of focal length 10cm. Determine the position and size of the produced image if the object is placed at:
A. 30 cm
B. 5 cm
A light bulb is placed to the left of a convex lens of focal length 20 cm. The image formed is enlarged 5 times and is to the right of the lens. Find the image distance and the object distance.
A plate of glass, with thickness t (green), is shown below. Find the distance, d (in red), that the ray is displaced.
A telescope is constructed with two lenses separated by 25 cm. The focal length of the objective is 20 cm. The focal length of the eyepiece is 5.0 cm. If an object is 100 m away from the objective lens, where is the final image of the eyepiece? What is its magnification?
An object is 20 cm in front of a lens of focal length 9.5 cm. A second lens of focal length -30 cm is 15 cm behind the first lens. Find the location of the final image and its magnification.
A diverging lens with f = -20 cm is placed 12 cm to the left of a converging lens of f = 35 cm. If a 20 m tall object is 50 cm to the left of the diverging lens, where is the final image located and how tall is the image?
When Mars is nearest the Earth, the distance separating the two planets is 88.6 x 106 km. Mars is viewed through a telescope whose mirror has a diameter of 30.0 cm. If the wavelength of the light is 590 nm, what is the smallest distance that can be resolved between the two points on Mars?