slime

• What is the path of light according to the study material?

  Light travels in straight lines
• What type of shadow is formed when the light source is very small?

  Sharp dark shadow
• What type of shadow is formed when the light source is large?

  Fuzzy dark shadow
• What is used to create a single pinhole in the study material?

  Black paper
• What can you see on the screen/wall when using a single pinhole in black paper?

  Image of the filament of the bulb
• What does the law of reflection state?

  Angle of reflection equals angle of incidence
• What is the term for reflection from a smooth surface in a single direction?

  Specular reflection
• What is the term for reflection from a rough surface that causes scattering?

  Diffuse reflection
• What are the characteristics of an image reflected by a plane mirror?

  Upright, laterally inverted, same size, same distance
• What are the key properties of an image formed by a plane mirror?

  • Upright
  • Laterally inverted
  • Same size as the object
  • Same distance from the mirror as the object
• What is the angle of incidence?

  Angle between incident ray and normal
• What is the angle of reflection?

  Angle between reflected ray and normal
• What is the reflected ray?

  Ray of light after reflection
• What are the differences between specular and diffuse reflection?

  • Specular reflection: Smooth surface, single direction
  • Diffuse reflection: Rough surface, scattering
• If the angle of incidence is $30^\circ$, what is the angle of reflection?


  $30^\circ$
• Why does a rough surface cause diffuse reflection?

  Because it scatters light in multiple directions
• If you place an object 5 meters from a plane mirror, how far will the image appear to be from the mirror?

  5 meters
• Why is the image in a plane mirror laterally inverted?

  Because the left and right sides are swapped
• What is the term for the line perpendicular to the surface at the point of incidence?

  Normal
• If the angle of incidence is $45^\circ$, what is the angle between the incident ray and the reflected ray?


  $90^\circ$
• How does the size of the light source affect the shadow formed?

  Small source creates sharp shadow, large source creates fuzzy shadow
• Why does a plane mirror produce an image that is the same size as the object?

  Because the mirror reflects light without changing its size
• If you move an object closer to a plane mirror, what happens to the image distance?

  Image distance decreases
• Why is the image in a plane mirror upright?

  Because the mirror reflects light without inverting it vertically
• What is the term for the ray of light that strikes a surface?

  Incident ray
• If the angle of incidence is $60^\circ$, what is the angle of reflection?


  $60^\circ$
• How does the law of reflection apply to both specular and diffuse reflection?

  Angle of reflection equals angle of incidence in both cases
• Why does a plane mirror produce an image that is the same distance from the mirror as the object?

  Because the mirror reflects light without changing the distance
• If you place an object 3 meters from a plane mirror, how far will the image appear to be from the mirror?

  3 meters
• Why does a rough surface scatter light in diffuse reflection?

  Because the surface has irregularities that reflect light in different directions