A converging lens has the focal length of 25 cm. A 10-cm object is placed at 30 cm in front of the lens. How far is the image from the lens? What is the size of the image?

Explanation:

Given that,

Focal length of a converging lens, f = +25 cm

Size of the object, h = 10 cm

Object distance, u = -30 cm

We need to find the image distance and the size of the image.

Using lens formula, , v is image distance

Magnification,

h' is the size of image

So, the image distance is 150 cm the size of image is 50 cm.

the first, second, and fifth options

this means that the temperature of both substances will be equal