Question

1. What happens to the position of the image when the position of the object is
getting closer to the convex lens? (1)
2. When is a highly diminished and point size image is formed by a convex lens?
Whether is it a real or virtual image? (2)
3. At what position of the object, a convex lens produces a small size image? What
is the position of the image in this case? Draw a ray diagram to support your
answer. (3)
4. Define the following terms:
a) Lens formula (Write the formula) (1)
b) Magnification (Definition and formula) (2)
c) Power of a lens (Definition and formula) (2)
d) SI unit of power of a lens (Definition) (2)
5. Why are the power of a convex lens positive and that of the concave lens negative? (2)
6. Find the power of a concave lens of focal length 2 m. (2)
7. Which one of the following materials cannot be used to make a lens? (1)
(a) Water (b) Glass (c) Plastic (d) Clay
8. Where should be an object placed in front of a convex lens to get a real image of
the size of the object? (1)
(a) At the principal focus of the lens
(b) At twice the focal length
(c) At infinity
(d) Between the optical center of the lens and its principal focus.

Answer 1

Answer:

please speak the question in simple language

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