(a) Explain why a real image can be projected on a screen but a virtual image cannot.
(b) Draw a ray diagram to show the formation of a real diminished image of an object by a convex lens. In your diagram, the position of the object and image with respect to the principal focus should be shown clearly.
(c) Name one simple optical instrument in which the above arrangement of the convex lens is used.
(a) Explain why a real image can be projected on a screen but a virtual image cannot.
(b) Draw a ray diagram to show the formation of a real diminished image of an object by a convex lens. In your diagram, the position of the object and image with respect to the principal focus should be shown clearly.
(c) Name one simple optical instrument in which the above arrangement of the convex lens is used.
(a) A real image can be projected on a screen but a virtual image cannot because a real image is formed when light rays coming from an object actually meet at a point after refraction through a lens while a virtual image is formed when light rays coming from an object only appear to meet at a point when produced backward (but do not actually meet) after refraction through a lens.
(b) In the convex lens when the object is placed beyond the center of curvature its image is formed between the focal point and the center of curvature. The nature of the image is real, inverted, and diminished.
(c) a simple camera
A simple camera is based on the principle that the lens is adjusted to keep the object beyond the center of curvature and then the image of the object is formed between the focus and center of curvature.
(a) A real image can be projected on a screen but a virtual image cannot because a real image is formed when light rays coming from an object actually meet at a point after refraction through a lens while a virtual image is formed when light rays coming from an object only appear to meet at a point when produced backward (but do not actually meet) after refraction through a lens.
(b) In the convex lens when the object is placed beyond the center of curvature its image is formed between the focal point and the center of curvature. The nature of the image is real, inverted, and diminished.
(c) a simple camera
A simple camera is based on the principle that the lens is adjusted to keep the object beyond the center of curvature and then the image of the object is formed between the focus and center of curvature.
