GCSE Physics - How to Draw Ray Diagrams #70

The video tutorial explains how to draw ray diagrams for concave and convex lenses. It starts with concave lenses, detailing the process of setting up the lens, axis, and focal points, and how to draw incident rays to determine the image's position. The tutorial then covers convex lenses, explaining the differences in ray behavior and image formation. It also discusses how the position of the object relative to the focal points affects the image's characteristics, such as being real or virtual, upright or inverted, and its size relative to the object.

What is the primary characteristic of a concave lens?

• It has no effect on light rays.

• It converges light rays to a point.

• It reflects light rays back.

• It diverges light rays outward.

When drawing a ray diagram for a concave lens, what is the significance of the focal point?

• It is the point where the lens is thickest.

• It is used to draw virtual rays for refraction.

• It is the starting point for all incident rays.

• It is where all rays converge.

What type of image is formed by a concave lens?

• Real and inverted

• Virtual and upright

• Real and upright

• Virtual and inverted

How do convex lenses differ in shape from concave lenses?

• They are wider at the center.

• They are the same shape as concave lenses.

• They are narrower at the center.

• They have a flat surface.

What happens to a ray passing through the center of a convex lens?

• It is refracted towards the focal point.

• It diverges outward.

• It continues straight without refraction.

• It is reflected back.

If an object is placed at twice the focal distance from a convex lens, what is the nature of the image formed?

• Virtual, upright, and larger

• Real, inverted, and same size

• Virtual, upright, and smaller

• Real, inverted, and larger

What is the characteristic of an image formed when an object is placed between the focal point and a convex lens?

• Real, upright, and same size

• Virtual, upright, and larger

• Virtual, inverted, and smaller

• Real, inverted, and smaller