It is an eye condition in which a person is able to clearly see distant objects but not nearby objects. It happens because the eyeball is too short and the images of the distant objects are formed behind the retina.

• Myopia

• hyperopia

• Astigamatism

• Color Blindness

It is an optical instrument used to magnify objects so that you may be able to see more details or features that are normally undetectable.

It is an aberration due to irregularities in the curvature of the refracting surfaces. These irregularities prevent the image from being perfectly focused on the retina.

It is an eye condition in which a person can clearly see nearby objects but not distant objects. It occurs when the eyeball is too long and the images of distant objects are focused in front of the retina.

If the magnification of a mirror is +0.4, the image is:

• Real and inverted

• Virtual and erect

• Real and erect

• Enlarged

An object 6 cm tall is placed 18 cm from a concave mirror of focal length 9 cm. Find the magnification.

• 1cm

• -1cm

• 0.5 cm

• 0.5 cm

For a convex mirror, the image formed is always:

• Real and inverted

• Virtual and erect

• Real and erect

• Enlarged and inverted

A convex mirror has a focal length of 12 cm. An object is placed 20 cm from the mirror. What is the image distance?

• -30cm

• 7.5 cm

• -7.5cm

• 30cm

A convex mirror has a focal length of 15 cm. An object is placed 10 cm from the mirror. The image distance is:

It is an optical instrument used to magnify objects so that you may be able to see more details or features that are normally undetectable.