Mastering Ray Diagrams and Lenses

Ray diagrams show a ray of light's path from the object emitting light to a mirror, and then to a person's eye.

Refraction is the bending of light when it moves from one medium to another.

Lenses are transmissive optical devices that affect the focusing of a light beam through refraction.

<p>Convex lenses are lenses that converge light, bending light that is spreading apart until the beams come together to meet at a point.</p> Signup and view all the answers

<p>Concave lenses are lenses that diverge light, bending light that's coming together to make the beams spread further apart.</p> Signup and view all the answers

<p>A ray is a path of light drawn as a straight line coming from a source. It is used to show the direction in which light is moving.</p> Signup and view all the answers

<p>The principal axis is a horizontal line that serves as a reference point for drawing the lens. The dots labeled 'F' represent the focal points of the lens.</p> Signup and view all the answers

<p>The object can be placed inside the focal point, at the focal point, or outside the focal point, depending on the question.</p> Signup and view all the answers

<p>In step 3, the ray is drawn towards the focal point on the far side, but once it hits the lens, it is bent parallel to the principal axis. In step 4, the ray is drawn parallel to the principal axis and then bent away from the focal point on the near side.</p> Signup and view all the answers

<p>If the image forms on the opposite side of the lens to the object, it is a real image. If the image forms on the same side of the lens as the object, it is a virtual image.</p> Signup and view all the answers

<p>The purpose of drawing a ray diagram is to describe an image fully.</p> Signup and view all the answers

<p>The two main shapes of lenses are convex and concave. Convex lenses converge light, while concave lenses diverge light.</p> Signup and view all the answers

<p>Corrective glasses for nearsightedness use a concave lens to focus the light and create an image closer to the person's eye.</p> Signup and view all the answers

<p>Corrective glasses for farsightedness use a convex lens to focus the light further away from the person's eye.</p> Signup and view all the answers

<p>Refraction is the bending of light when it moves from one medium to another. Lenses work by utilizing refraction to focus light at a point where it can be viewed.</p> Signup and view all the answers