Lenses (physics Only) (GCSE Physics)

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

An object is placed 5 cm in front of a lens whose focal length is 10 cm. The image distance computed by thin lens equation is negative. Which best describes the image?

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

A beam of red light and a beam of blue light enter a glass prism at the same angle. Which statement is true about their angles of refraction in the glass?

A positive thin lens is used to correct hyperopia (long-sightedness). Where does this lens form the virtual image of a nearby object relative to the eye?

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 lens produces an image with magnification m = -2. What does this tell you about the image?

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?

Which ray through a thin lens passes undeviated (in a straight line) through the centre of the lens?

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

Light slows when entering glass from air. Which of the following explains why the wavelength changes but frequency remains the same?