Light Reflection and Refraction

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Questions and Answers

What is reflection primarily responsible for in a flashlight?

  • Changing the color of the light
  • Bouncing light into a beam (correct)
  • Absorbing light from the surroundings
  • Creating a heat source

How does light behave when it passes from air into water?

  • It reflects off the water surface
  • It bends, causing optical illusions (correct)
  • It remains unaffected
  • It travels faster

What common household item uses reflection for visibility?

  • Ceiling fan
  • Window
  • Lamp
  • Mirror (correct)

What phenomenon can create a rainbow in the sky?

<p>Light bending through raindrops (A)</p> Signup and view all the answers

Why do human eyes struggle to see well in the dark?

<p>They lack special adaptations like animal eyes (D)</p> Signup and view all the answers

Which statement about refraction is true?

<p>It can cause objects to appear bent (D)</p> Signup and view all the answers

What kind of light behavior can be observed in a still body of water?

<p>Mirror-like reflection (B)</p> Signup and view all the answers

What tool uses refraction to magnify small text?

<p>Magnifying glass (D)</p> Signup and view all the answers

What is the primary effect of light reflection?

<p>Bounce back of light (B)</p> Signup and view all the answers

Which of the following is NOT an example of refraction?

<p>An image reflected in a mirror (D)</p> Signup and view all the answers

Flashcards

Reflection

The bouncing back of light when it hits a surface.

Reflective Surface

A shiny surface that reflects light, like a mirror or a calm body of water.

Refraction

The bending of light as it passes from one medium to another, like from air to water.

Dispersion of Light

The separation of white light into its different colors, like in a rainbow.

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Magnifying Glass

A tool that uses refraction to magnify objects, making them appear larger.

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Straight Path of Light

The path that light travels in a straight line.

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Transparency

The ability of a material to allow light to pass through it, like glass.

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Translucency

The ability of a material to scatter light, like frosted glass.

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Opacity

The ability of a material to block light from passing through it, like a wall.

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White Light

The combination of all the colors of the visible spectrum, which appears white.

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Study Notes

Reflection

  • Reflection is the bouncing of light off a shiny surface.
  • Flashlights use reflection to direct light from a bulb into a beam.
  • The shiny surface of a flashlight reflects light in any desired direction.
  • Mirrors use reflection to show an image of objects.
  • Light travels in a straight line and cannot bend around objects.
  • Reflecting surfaces can create visual illusions, like multiple objects, such as the appearance of two swans in a picture.
  • Reflection is a common occurrence in everyday life.

Refraction

  • Refraction is the bending of light as it passes from one material to another.
  • Light bends when it changes from one medium to another (e.g., air to water).
  • The path of light is affected by the material it is travelling through.
  • An example of refraction is how a flower stem in water appears to be broken.
  • Rainbows are formed by light being refracted by raindrops.
  • Magnifying glasses use refraction to make objects appear larger.
  • Refraction is important for people who wear glasses, as it helps them see clearly.

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