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, describing their diverging nature and how to represent them in diagrams. The process involves drawing incident rays and determining the image's position, which is always virtual and upright. The tutorial then covers convex lenses, which converge light to a point. It explains how to draw ray diagrams for these lenses, noting that the image can be real, inverted, and vary in size depending on the object's distance from the lens. The video emphasizes understanding these concepts for exams.

What is the primary characteristic of a concave lens?

• It absorbs light rays.

• It reflects light rays back.

• It diverges light rays outward.

• It converges light rays to a point.

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

• It is the center of the lens.

• It is used to draw virtual rays.

• It is where the rays diverge.

• It is where the rays converge.

In a concave lens ray diagram, what type of image is formed?

• Real and upright

• Virtual and inverted

• Virtual and upright

• Real and inverted

What is the main difference in the representation of convex lenses compared to concave lenses?

• Convex lenses are narrower at the center.

• Convex lenses are wider at the center.

• Convex lenses have outward V shapes.

• Convex lenses have inward V shapes.

For a convex lens, what happens to a ray passing through the center of the lens?

• It is absorbed by the lens.

• It continues straight without refraction.

• It is refracted away from the focal point.

• It is refracted towards the focal point.

What type of image is formed when an object is placed more than twice the focal distance from a convex lens?

• Real, inverted, and smaller

• Virtual, upright, and smaller

• Virtual, inverted, and larger

• Real, inverted, and larger

If an object is placed between the focal point and a convex lens, what type of image is formed?

• Virtual, inverted, and smaller

• Real, upright, and larger

• Virtual, upright, and larger

• Real, inverted, and smaller