How Light Act as a Wave and a Particle

Compare the angle of incidence from angle of reflection in a regular reflection.

• The angle of incidence is equal to the angle of reflection.

• The angle of incidence is less than the angle of reflection.

• The angle of incidence is greater than the angle of reflection.

• The angle of incidence is never equal to the angle of reflection.

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Why does light bend (refracts) when it enters from air to water?

• Light has a tendency to go in all direction.

• It enters a material with different optical density.

• Light changes its direction due to the resistivity of the material.

• The bending of light is dependent upon the conductivity of the material.

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How does the light bends as it enters from air to glass?

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White light is separated into spectrum of colors by a prism. What does this mean?

• White light has no color.

• Prism emits different colors.

• Prism absorbs the white light.

• Component colors of light are refracted at different angles

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Upon exiting a glass prism, white light is dispersed. Which color bends the most?

• Red

• Blue

• Violet

• Orange

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How will the velocity of light change, as it enters a denser medium?

• Light will slow down.

• There will be an increase in its speed.

• The speed of light will change in unknown value.

• The light will change its direction and bend toward the normal.

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If you were to fish by bow and arrow technique, where would you aim to actually strike a fish?

• Strike exactly where you see the fish.

• Aim below the fish; it is actually deeper than you think.

• Shoot a little above its head; refraction causes a different perception of its depth.

• In the morning, hit it above, but in the afternoon, aim it below because the light is dimmer.

How does the photoelectric effect demonstrate the particle characteristics of light?

• Light bounces off like a wave, as it shines on the metal surface.

• Light may knock the electrons out of the metal surface as if light were made of particles.

• Intense radiation may (large-amplitude waves) may cause emitted electrons to have more energy.

• The Energy of the electron emitted from metal surface is dependent on the speed of the light that shined on it.

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What does the theories of modern physics tells us about light?

• Demonstrate wave property only

• Exclusively shows particle property

• It combines wave and particle properties

• It has neither wave nor particle properties

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What color of light do photographers usually use in dark rooms? Why?

• Yellow light since paper is not sensitive to this color.

• Regular light may be used since it won’t affect the printing.

• Red light does not cause the film to be exposed since it has low energy.

• Violet light has the highest energy which is used to give color to the pictures.