Properties of Light and Objects

The video explains that light travels as a transverse wave and can move through a vacuum, unlike sound. It travels at 300 million meters per second and takes about eight minutes to reach Earth from the sun. Objects that emit light are called luminous, while those that don't are non-luminous. Light can reflect off non-luminous objects, allowing us to see them. Light can travel through gases, liquids, and some solids, and objects that allow light to pass through are either transparent or translucent. Opaque objects do not transmit light, absorbing most of it. The video concludes with resources for further learning.

What type of wave does light travel as?

• Longitudinal wave

• Transverse wave

• Surface wave

• Mechanical wave

How do we see objects?

• When light is emitted by the object

• When light is absorbed by the object

• When light is reflected off the object and into our eyes

• When light passes through the object

Why can light travel through space?

• Because light does not need particles to travel

• Because light is a sound wave

• Because space is a solid medium

• Because space is filled with particles

What are objects called that emit light?

• Opaque

• Translucent

• Luminous

• Non-luminous

Which of the following is a non-luminous object?

• Sun

• Candle

• Football

• Light bulb

What do we call objects that allow light to pass through them?

• Opaque

• Reflective

• Translucent or Transparent

• Luminous

Which of the following is a transparent object?

• Metal

• Wood

• Frosted glass

• Clear glass

What happens to light when it passes through a translucent object?

• It is reflected back

• It is scattered

• It is completely absorbed

• It passes through without any change

What do we call objects that do not allow light to pass through them?

• Transparent

• Translucent

• Opaque

• Luminous

What happens to most of the light that hits an opaque object?

• It is absorbed

• It is scattered

• It is transmitted

• It passes through