A purple neon sign emits light waves with which of the following wavelengths?

• red and blue wavelengths

• purple wavelengths

• all wavelengths but purple

• all wavelengths

Tags

NGSS.MS-PS4-2

On a calm day, you can see your reflection in a pond. On a windy day you cannot, because the surface is ________________, resulting in ________________ reflection.

• smooth, clear

• rough, diffused

• calm, perfect

• still, distorted

Tags

NGSS.MS-PS4-2

Light bends as it passes from air into glass at an angle due to __________.

• reflection

• refraction

• absorption

• diffusion

Tags

NGSS.MS-PS4-2

What is the key difference between a convex mirror and a convex lens?

• A convex mirror reflects light, while a convex lens refracts light.

• A convex mirror refracts light, while a convex lens reflects light.

• Both a convex mirror and a convex lens reflect light.

• Both a convex mirror and a convex lens refract light.

Blackout curtains are designed to keep light out of a space. These curtains are made using material that is ________________.

• transparent

• translucent

• opaque

• reflective

Tags

NGSS.MS-PS4-2

Light reflects off paper, yet you cannot see your reflection in paper. Why not?

• Paper absorbs all light

• Paper is too smooth

• Paper reflects light in many directions

• Paper is transparent

Tags

NGSS.MS-PS4-2

The point where light rays converge to a point is called the ___________ point.

• Divergent

• Focal

• Reflection

• Diffusion

What type of mirror is used to start a campfire using sunlight?

• Convex mirror

• Concave mirror

• Flat mirror

• Cylindrical mirror

What happens to light rays when they hit a concave mirror?

• They spread out

• They converge

• They disappear

• They remain parallel

Tags

NGSS.MS-PS4-2

Which light ray is shown being reflected in the diagram?

• Ray 1

• Ray 2

• Ray 3

• Ray 4

Tags

NGSS.MS-PS4-2