You are looking into a shiny Christmas ornament (ball). The ball has a diameter of 8.0 cm. Where does your image appear to be if you are holding the ball 20 cm from your face? What is the magnification?
A convex mirror in a store has a radius of curvature of 0.55 m. If a customer is 10 m from the mirror, where is the customer's image in the mirror? What is the magnification of the image of the image? What is the orientation of the image?
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?
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?
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?