Question

15. A needle placed 45 cm from a lens forms an image on a screen placed 90 cm on the other side of the lens. Determine its focal length and power. What is the size of the image if, needle is 5cm in height?

Answer 1

Answer:Plz mark brainliest!!

Explanation:

Answer 2

Answer:

Answer :

convex ;

Solution :

Here,<br> From<br><br> As f is positive, the lens must be convex. <br> From<br> As