Question

give answer with reason​

Answer 1

Answer:

all the three will see the image but virtual and inverted. on the surface of convex lens.

Explanation:

convex lens forms a real and inverted image of an object.

if a screen was placed instead of candle then only Robin and Kavita would be able to see the image of nail and block.

(in presence of light)

if you are in class eight or lower class then it is sufficient answer for you because later you will learn in class 10th in depth about the concept where the image will be form magnified or where will be erect or virtual and more....