Question

An image formed by a concave ___________ cannot be obtained on a screen. Fill in the blank.
Topic: Light

Answer 1

-$\textbf{lens}$-

This is because, the image formed concave lens, rays here don't meet ever and hopefully they meet at a point, which will be imaginary.

Answer 2

Dear Student,

◆ Answer -

An image formed by a concave lens cannot be obtained on a screen.

● Explaination -

• Image formed by concave lens is a virtual image.
• Hence, it cannot be obtained on the screen.

◆ Extra information -

• Spherical lens with surfaces curved inwards is called concave lens.
• It is thinned out in the middle and results in convergence of light rays.

Thanks dear. Hope this helps you...