If you wanted to draw the diagram to scale, you might actually find out the official focal length of the lens you're using, and position the focal length appropriately.
A focal length of 30 centimeters might become 3 centimeters on your diagram, depending on how large your piece of paper is.
Try It risk-free After completing this lab, you will be able to explain how lenses work, explain the difference between convex and concave lenses, draw ray diagrams to analyze the image produced by a lens, and apply that understanding to eyeglasses.
This is the process by which lenses work - they bend light until the image appears as we want it to, whether further away, closer, inverted, sharper..name it.We can use lenses to observe the largest things in the universe with a telescope and some of the smallest things with a microscope. Convex lenses are lenses that converge light, bending light that is spreading apart until the beams come together to meet at a point.Drawing the shape of the lens is mostly for show and as a reminder. We usually draw this as a stick-figure stood on the principal axis, or even just an upright arrow.You might have to place the object inside the focal point, at the focal point, or outside the focal point depending on the the question.But in today's lesson, we're going to talk about another method - drawing ray diagrams.
A ray is a path of light drawn as a straight line coming from a source.
And, they've given sight to people who could hardly see at all. And concave lenses are lenses that diverge light, bending light that's coming together to make the beams spread further apart.
The exact properties of a lens tell you what it will do.
For a CONCAVE lens: Step 3: Draw a straight line from the top of your object towards the focal point on the far side.
But once the ray hits the lens, bend the line parallel to the principal axis (so the ray never actually reaches the focal point it was pointed towards).
The rules are slightly different for a concave versus a convex lens.