Lenses (physics Only) (GCSE Physics)

Which ray rule is correct when drawing ray diagrams for a thin converging lens?

Why do simple eyeglass lenses suffer from chromatic aberration (colours focusing at different distances)?

A diverging (concave) lens always produces an image that is:

When light passes from glass (n = 1.5) to air, total internal reflection can occur. Which condition must be true for total internal reflection to be possible?

A glass lens has index n = 1.6. What is the speed of light in this glass? (c = 3.0 × 10^8 m/s)

A lens has power P measured in dioptres such that P = 1/f (f in metres). What is the power of a lens with focal length 0.25 m?

A camera lens produces a small aperture (large f-number). How does this affect depth of field and image brightness?

A monochromatic light beam strikes a glass–air boundary from inside the glass. The critical angle for the glass–air interface is 42°. If the angle of incidence inside the glass is 50°, what happens?

The lens equation is 1/f = 1/u + 1/v (with sign convention). If an object is at infinity (u ? 8) for a lens, where does the image form?

A thin converging lens forms an upright virtual image 12 cm tall when the object is 8 cm tall. What is the magnification and what does its sign indicate?

A thin lens produces a real image at 40 cm from the lens on the image side for an object placed 20 cm on the object side. What is the focal length?