Question

Readings of practical to find focalength of concave mirror using convex lens

Answer 1

Answer:

To determine focal length of a convex lens

Place the holder with the screen on the bench. The position of the screen should be such that the sharp image of the distant object is obtained on it. The difference between the position of the lens and the screen is equal to the focal length of the given convex lens.

Answer 2

Focal length of convex mirror can be found by using concave lens readings as both are identical in properties.

Explanation:

• Focal length of convex mirror can be found by using concave lens readings as both are identical in properties.
• It is the point at which the rays of light converge or diverge.
• Commonly it is known as the point at which all the parallel rays meet.
• It is represented by "f"
• It's formula is
• 1/f = 1/p + 1/q
• Where p sis the distance of  the object
• q is the distance of image from lens