ABO NOCE Basic Opticianry Ophthalmic Optics 2

Question 1

What is the vergence of light rays that are parallel (coming from optical infinity)?

Accepted Answer

Zero vergence

Answer

Positive vergence

Answer

Negative vergence

Answer

Maximum vergence

Question 2

A lens with a power of -3.00 D will cause light rays to:

Accepted Answer

Diverge as if from a point 33 cm in front of the lens

Answer

Converge to a focal point 33 cm behind the lens

Answer

Converge to a focal point 33 cm in front of the lens

Answer

Have no effect on vergence

Question 3

Which law states that the angle of incidence equals the angle of reflection?

Accepted Answer

Law of Reflection

Answer

Snell's Law

Answer

Prentice's Rule

Answer

Fermat's Principle

Question 4

The index of refraction of a material is defined as the ratio of:

Accepted Answer

The speed of light in a vacuum to the speed of light in the material

Answer

The speed of light in the material to the speed of light in a vacuum

Answer

The wavelength in the material to the wavelength in air

Answer

The density of the material to the density of air

Question 5

What is the primary optical difference between a plano-convex and a biconvex lens of equal power?

Accepted Answer

Biconvex has less spherical aberration

Answer

Plano-convex always has higher Abbe value

Answer

Biconvex produces less chromatic aberration

Answer

Plano-convex is always thinner at the center

Question 6

When light travels from a medium of lower index to a medium of higher index, it bends:

Accepted Answer

Toward the normal

Answer

Away from the normal

Answer

Parallel to the surface

Answer

At the critical angle

Question 7

A prism with its apex pointing upward will deviate a light ray:

Accepted Answer

Toward the base (downward)

Answer

Toward the apex (upward)

Answer

To the left

Answer

No deviation occurs