GCSE Physics - How Lenses Work #69

The video tutorial explains how lenses focus and disperse light through refraction, covering the differences between convex and concave lenses. It discusses the concepts of real and virtual images, lens symmetry, and focal length. The tutorial also provides guidance on describing images in exams, emphasizing the importance of noting whether images are real or virtual, upright or inverted, and their size relative to the object.

What is another name for a convex lens?

• Diverging lens

• Converging lens

• Flat lens

• Biconcave lens

How does the curvature of a lens affect its power?

• Curvature has no effect

• More curvature decreases power

• More curvature increases power

• Less curvature increases power

Where do real images form?

• Where light rays diverge

• In front of the object

• Where light rays converge

• Behind the lens

What happens to the image on your retina?

• It is upright

• It is magnified

• It is inverted

• It is virtual

What is a common example of a virtual image?

• A movie screen

• A reflection in a mirror

• A shadow

• A photograph

How are virtual images formed?

• By virtual rays that appear to converge

• By diverging light rays

• By real rays that pass through a lens

• By converging light rays

When describing images in exams, what should be mentioned?

• Only the size of the image

• Only the orientation of the image

• The color of the image

• Whether the image is real or virtual, and its orientation and size