. Fill in the blanks: a. An image that cannot be obtained on a screen is called ____________

Fill in the blanks:

a. An image that cannot be obtained on a screen is called ____________.

b. Image formed by a convex _______ is always virtual and smaller in size.

c. An image formed by a _________ mirror is always of the same size as that of the object.

d. An image which can be obtained on a screen is called a _____ image.

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