Question

2.
दो-पिन विधि से अवतल दर्पण की फोकस दूरी ज्ञात कर।
Determine the focal length of a concave mirror by two-pin method.
गयता से एक उत्तल दर्पण की फोकस दूरी ज्ञात करें।
lens.​

Answer 1

Answer:

concave mirror on the stand and place it on a table, facing towards a distant object. Arrange the screen on the table so that the image of the distant object is obtained on it. Measure the distance between mirror and screen using a metre scale. It can be taken as the focal length (f) of the mirror.

Answer 2

The two-pin method is a simple and accurate way to determine the focal length of a concave mirror. It involves placing two pins at a known distance from each other in front of the mirror and measuring the distance between the two resulting images.

Here are the steps to perform the two-pin method:

• Place the concave mirror on a table or stand with its reflective side facing up.
• Take two pins and place them at a known distance from each other in front of the mirror. The pins should be placed along the principal axis of the mirror.
• Look into the mirror from the front and adjust the distance between the pins until their images are clear and in focus.
• Measure the distance between the two pin images (d) and record it.
• Measure the distance between one of the pins and the mirror (u) and record it.
• Calculate the focal length (f) of the mirror using the formula f = (d^2 - u^2) / (4u).
• By using the two-pin method, we can determine the focal length of a concave mirror with high accuracy.
• This is an important parameter that is used in many applications, such as in telescopes, microscopes, and other optical instruments.

To learn more about concave mirror from the given link.

https://brainly.in/question/49874195

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