Question

write any two required material to determine the focal length of a lens using UV mothed in laboratory​

Answer 1

Answer:

To find the focal length of a convex lens by plotting graphs between u and v or between 1/u and 1/v. An optical bench, two sharp-edged needle (pins), convex lens of less than 20 cm focal length, three uprights (with clamps), index needle (may be a knitting needle), metre scale and spirit level

How do you find the focal length of a convex lens using UV?

Note the value of u and v. You can calculate the focal length (F) of combination of lenses using the formula F = uv/(u+v). The focal length of convex lens (f1) is shown inside the simulator window. You can calculate the focal length of the concave lens using the formula f2 = (f1F/(f1-F).

Hope it helps you.If yes then plz Mark my answer the brainliest answer.

If not then sorry.

Answer 2

Answer:

A convex lens, screen and illuminated object are needed to determine the focal length.

Explanation:

• Place the convex lens between the illuminated object and the screen
• Adjust the convex lens or the screen till the image of the lens becomes extremely clear
• Measure the distance from the illuminated object to the convex lens which is u
• Measure the distance from the convex lens to the screen which is v
• Use the formula 1/f = 1/v + 1/u
• Substitute the values of v and u
• Solve the question to find the value of f

Using the above steps, we can determine the value of the focal length.

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