Compare and Contrast convex and concave Lenses (order jumbled)

1. Compare and Contrast convex and concave Lenses (order jumbled) Convex lenses are also called magnifying glasses because the virtual image is larger than the object. They are used in cameras, telescopes, microscopes and projectors. Concave lenses are used in some telescopes and in some safety backing viewers for vehicles. Convex lens Both lenses can be used for correcting eyesight problems. Convex lenses are used to correct for long-sight, however concave lenses are used to correct for short-sight. Both lenses can make virtual images but convex lenses can make real images depending on the distance from the lens to the object. Concave lens Concave lenses are also known as diverging lenses; parallel rays of light that enter it pass through it and then spread away from each other, looking like they have left from a point on the other side of the lens, known as a virtual focus Convex lenses are also known as converging lenses; parallel rays of light that enter it pass through and then pass through a single point, called the focus Convex lenses are wider in the middle than they are at the edges and concave lenses are the opposite, with the middle being thinner than the edges.

2. Compare and Contrast convex and concave Lenses (order jumbled) Convex lenses are also called magnifying glasses because the virtual image is larger than the object. They are used in cameras, telescopes, microscopes and projectors. Concave lenses are used in some telescopes and in some safety backing viewers for vehicles. Convex lens Both lenses can be used for correcting eyesight problems. Convex lenses are used to correct for long-sight, however concave lenses are used to correct for short-sight. Both lenses can make virtual images but convex lenses can make real images depending on the distance from the lens to the object. Concave lens Concave lenses are also known as diverging lenses; parallel rays of light that enter it pass through it and then spread away from each other, looking like they have left from a point on the other side of the lens, known as a virtual focus Convex lenses are also known as converging lenses; parallel rays of light that enter it pass through and then pass through a single point, called the focus Convex lenses are wider in the middle than they are at the edges and concave lenses are the opposite, with the middle being thinner than the edges.

3. Compare and Contrast convex and concave Lenses – logical sequence Convex lenses are wider in the middle than they are at the edges and concave lenses are the opposite, with the middle being thinner than the edges. Convex lenses are also known as converging lenses; parallel rays of light that enter it pass through and then pass through a single point, called the focus Concave lenses are also known as diverging lenses; parallel rays of light that enter it pass through it and then spread away from each other, looking like they have left from a point on the other side of the lens, known as a virtual focus Both lenses can make virtual images but convex lenses can make real images depending on the distance from the lens to the object. Both lenses can be used for correcting eyesight problems. Convex lenses are used to correct for long-sight, however concave lenses are used to correct for short-sight. Concave lens Convex lens Convex lenses are also called magnifying glasses because the virtual image is larger than the object. They are used in cameras, telescopes, microscopes and projectors. Concave lenses are used in some telescopes and in some safety backing viewers for vehicles.

4. Compare and Contrast convex and concave Lenses Convex lenses are wider in the middle than they are at the edges and concave lenses are the opposite, with the middle being thinner than the edges. Convex lenses are also known as converging lenses; parallel rays of light that enter it pass through and then pass through a single point, called the focus Concave lenses are also known as diverging lenses; parallel rays of light that enter it pass through it and then spread away from each other, looking like they have left from a point on the other side of the lens, known as a virtual focus Both lenses can make virtual images but convex lenses can make real images depending on the distance from the lens to the object. Both lenses can be used for correcting eyesight problems. Convex lenses are used to correct for long-sight, however concave lenses are used to correct for short-sight. Concave lens Convex lens Convex lenses are also called magnifying glasses because the virtual image is larger than the object. They are used in cameras, telescopes, microscopes and projectors. Concave lenses are used in some telescopes and in some safety backing viewers for vehicles.

5. Judgement Statement for this question • For achieved, for this question, the candidate should: • Have labelled the two lenses correctly and have any two key points – probably from the list given on the example • For merit, for this question, the candidate should: • Have labelled the two lenses correctly and have two similarities and two differences • For excellence, for this question, the candidate should: • Have labelled the two lenses correctly and have two similarities and three differences, and • One use for each type of lens