Lens Ray Diagrams

Which lens diverges light?

• concave mirror

• convex mirror

• concave lens

• convex lens

A ray of light directed at which point of the lens will pass through undeviated?

• focus

• twice the focus

• principal axis

• optical centre

Which of the following can converge a parallel beam of light?

• Concave mirror and convex lens

• Concave mirror and concave lens

• Convex mirror and concave lens

• Convex mirror and convex lens

A ray of light parallel to the principal axis of a lens after refraction passes through:

• optical centre

• focus

• twice the focus

• none of these

The distance between two focal points of a spherical lens is 20cm. The focal length of the lens is:

• 10 cm

• 20 cm

• 40 cm

• 5 cm

A spherical lens forms an upside down image. The image is:

• real

• virtual

• can be real or virtual

• none of these

 Image formed by concave lens is always:

• real and erect

• real and inverted

• virtual and inverted

• virtual and erect

An object is placed at the focus of a convex lens. The image is formed at:

• the focus

• the optical centre

• 2F

• at infinity

A convex lens gives real, inverted and same size image if the object is placed

• at F

• at 2F

• at infinity

• beyond 2F

A convex lens gives virtual, and magnified image of the object when object is:

• At F

• Between O and F

• At 2F

• Between F and 2F