4. For the experiment on finding the focal length of a convex lens by obtaining the image of a distant
object, a laboratory assistant keeps the following apparatus on the table:
A. A stand with a metal needle fixed in it
B. A stand with the given convex lens fitted in it
C. A thick cardboard white screen
D. A metre scale
A student can do the experiment by using the apparatus listed as
a) D, A, B b) B, C, D
c) A, B, C
d) C, D, A
Answers
Answer:
Explanation:
A convex lens is a merging focal point. At the point when parallel beams of light go through a raised focal point, the refracted beams meet at one point called the principal focus. The separation between the chief concentration and the focal point of the focal point is known as the focal length.
Following are the approaches to get the central length of curved focal point:
The convex lens is thicker in the center and more slender at the edges and is otherwise called the converging lens.
The refracted beams from the parallel light emission meet on the opposite side of the convex lens.
In the event that the picture is gotten at the focus of the lens, the picture would be genuine, rearranged and little.
f is the focal length which is the contrast between the optical focal point of the focal point and the principal focus.
The picture can be gotten on the screen as the picture framed by the lens is real.