Science 8 - Optics Review

What is the meaning of opaque?

• No light is transmitted through a material

• Some light is transmitted through the material and some is reflected off

• All light is transmitted through the material

What is the meaning of translucent?

• No light is transmitted through a material

• Some light is transmitted through the material and some is reflected off

• All light is transmitted through the material

What is the meaning of transparent?

• No light is transmitted through a material

• Some light is transmitted through the material and some is reflected off

• All light is transmitted through the material

The medical condition of myopia is corrected with

• A convex lens

• A concave lens

• A convex mirror

• A concave mirror

Answer explanation

Myopia is when light reflected through the lens of the eye focuses in front of the retina. By dispersing the light slightly more, a concave lens allows light to focus properly ON the retina

What is represented here?

• A convex lens

• A concave lens

• A convex mirror

• A concave mirror

Which of the following have the shortest wavelength?

• Radio Waves

• Microwaves

• X-Rays

• Gamma Rays

The imaginary line passing through the centre of the mirror in this diagram is called the:

• Normal

• Ray

• Principal Axis

• Line

Of the following, which has the longest wavelength?

• X-Ray

• Radio Wave

• Microwave

• Ultraviolet

Concave lenses are often called _____ lenses

• Reflecting

• Converging

• Refracting

• Diverging

Another term for farsightedness is

• Astigmatism

• Hyperopia

• Myopia

• Presbyopia