Light and Universe

• What is neuroplasticity?

  Neuroplasticity increases strength of neurons
• What is the solar system?

  The solar system includes the Sun and orbiting objects
• What is at the center of the solar system?

  The Sun is at the center of the solar system
• Why does the Sun appear larger than other stars?

  It is closer to Earth than other stars
• What creates the Sun's strong gravitational field?

  The Sun's enormous mass creates a strong field
• How do planets orbit the Sun?

  Planets orbit in roughly circular paths
• What causes the seasons on Earth?

  Earth's tilt affects sunlight distribution
• What happens during the lunar month?

  The Moon orbits the Earth in about a month
• What is the effect of solar radiation on Earth?

  Solar radiation is unevenly spread across Earth
• What are some uses of satellites?

  Satellites are used for navigation and communication
• What is the law of reflection?

  The angle of incidence equals the angle of reflection
• How do prisms affect light?

  Prisms disperse light into a spectrum
• Why do white objects appear white?

  They reflect all colors in the spectrum
• Why do black objects appear black?

  They absorb all colors in the spectrum
• How do red objects appear red?

  They reflect red color and absorb others
• How do green objects appear green?

  They reflect green color and absorb others
• What happens to light when it passes through different materials?

  Light bends or refracts when passing through
• What does a ray diagram show?

  How light travels and interacts with surfaces
• How is a ray represented in a ray diagram?

  As a straight line with an arrowhead
• What is the normal in a ray diagram?

  A line perpendicular to the mirror
• What does the law of reflection state?

  Angle of incidence equals angle of reflection
• What happens to the angle of reflection when the angle of incidence increases?

  The angle of reflection also increases
• Where is the reflected ray located in relation to the normal?

  On the opposite side of the normal
• What does the third law of reflection state?

  The reflected ray lies in the same plane as the incident ray
• What happens to light when it enters a more dense material?

  It bends towards the normal
• What happens to light when it leaves a more dense material?

  It bends away from the normal
• What is the purpose of the refraction activity?

  To measure angles of incidence and refraction
• What are the steps in the refraction activity?

  1. Draw around a glass block
  2. Add a normal line
  3. Draw lines at 15°, 30°, and 60°
  4. Shine light along the 15° line and draw the emerging ray
  5. Draw the refracted ray and measure the angle
  6. Repeat for 30° and 60°
• What is the angle of refraction when the angle of incidence is 15°?

  9°
• What is the angle of refraction when the angle of incidence is 30°?

  18°
• What is the angle of refraction when the angle of incidence is 60°?

  36°
• Why does light move closer to the normal when entering glass?

  Because glass has a higher density
• Is light traveling faster in air or glass? Why?

  In air, due to lower density
• What is true about light's travel in all materials?

  Light travels straight in all materials