To start a campfire using a small mirror to light paper or dry grass.  What shape of mirror would they use. Describe what happens to the sunlight when they do this, using a ray diagram

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A man holds a rectangular card in front of and parallel to a plane mirror. In order for him to see the entire image of the card, the least mirror area needed is: A. that of the whole mirror, regardless of its size B. that of the pupil of his eye C. one-half that of the card D. one-fourth that of the card E. an amount which decreases with his distance from the mirror

Physics Mirror Equation Worksheet 1. An object is placed 15 cm from a converging (concave) mirror that has a focal length of 10 cm. a. Determine the image location b. If the object is 5 cm high, how high is the image? c. Is the image real or virtual? inverted or upright? larger or smaller?

A grating is a device that   a. bends light and allows it to focus at a point.   b. reflects light into a charge-coupled device (CCD) to enhance the details of an image.   c. disperses light into its component colors using thousands of microscopic parallel grooves.   d. connects optical telescopes to an interferometer.

pility: Good to go The sun is 150,000,000 km from earth; its diameter is 1,400,000 km. For a science project on solar power, a student uses a 24-cm-diameter converging mirror with a focal length of 53 cm to focus sunlight onto an object. This casts an image of the sun on the object. For the most intense heat, the image of the sun should be in focus. a. Where should the object be placed? b. What is the diameter of the image? 2 c. The intensity of the incoming sunlight is 1050 W/m². What is the total power of the light captured by the mirror? d. What is the intensity of sunlight in the projected image? Assume that all of the light captured by the mirror is focused into the image. Focus 88 E 84°F ^

if you want to set fire to a pile of leaves with a lens, which of these is the best one to use? A. convex lens  B. concave lens

The pictures show some of the ways that lenses and mirrors can change the way things look. Which statement correctly explains why this happens? A. Light changes the way things look because it is transparent. B. Light changes the way things look because it is opaque. C. Light changes the way things look because it can vibrate matter. D. Light changes the way things look because it bends around and bounces off matter.

The direction that a light wave bends once it enters the refracted medium depends on a. The index of refraction of the incident medium only. b. The indices of refraction of both the incident and refracted media. C. The angle of incidence of the incident light ray only. d. The index of refraction of the refracted medium, only.

A student wants to use a converging lens to project a real image of a candle onto a screen. The student wants to get maximum magnification and places the candle at the focal point of the lens as shown in the diagram below: Focal point What type of image will be produced by the setup shown in the diagram? (DOK 1) A. A larger, real image will be formed but inverted. B. No image will be formed. C. A larger, virtual image will be formed inverted. D. 1. A smaller, real image will be formed but inverted.