Tensai Science Quiz

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Grade 8 - Light and Optical Systems

Properties of light, reflection, refraction, and optical technologies

What type of mirror curves inward like the inside of a spoon?

Concave mirror
Convex mirror
Plane mirror
Parabolic mirror

What happens to light when it passes from air into water?

It bends toward the normal
It bends away from the normal
It travels in a straight line
It disappears

What is the bending of light called?

Diffraction
Reflection
Refraction
Dispersion

Which part of the human eye controls the amount of light entering?

Lens
Pupil
Cornea
Retina

What type of lens is thicker in the middle and thinner at the edges?

Convex lens
Concave lens
Plane lens
Cylindrical lens

What is the speed of light in a vacuum?

3,000 km/s
150,000 km/s
30,000 km/s
300,000 km/s

What device uses two or more lenses to magnify small objects?

Microscope
Telescope
Periscope
Camera

Which color of visible light has the shortest wavelength?

Blue
Red
Violet
Green

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Edmonton

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