Respuesta :
Answer:
D) Image cannot be seen
Explanation:
As we know by lens formula
[tex]\frac{1}{d_i} + \frac{1}{d_o} = \frac{1}{f}[/tex]
now we know that
object is placed at the focal point of lens
[tex]d_o = f[/tex]
so we will have
[tex]\frac{1}{d_i} = 0[/tex]
so the image will form at infinite
so image will be at infinite distance from the lens
so it cannot be seen