Light: Reflection and Refraction
Grade 10 Physics - Detailed
Presentation
Introduction to Light
• Light is a form of energy that enables us to see
objects. It travels in a straight line.
Reflection of Light
• Reflection is the bouncing back of light from a
surface. Laws of reflection:
• 1. Angle of incidence = Angle of reflection
• 2. Incident ray, reflected ray, and normal lie in
the same plane.
Types of Reflection
• Regular reflection (smooth surface)
• Diffuse reflection (rough surface).
Image Formation by Plane Mirror
• Virtual, erect, same size, and laterally inverted
image formed behind the mirror.
Spherical Mirrors
• Concave and Convex mirrors. Principal axis,
pole, focus, radius of curvature, and center of
curvature.
Image Formation by Spherical
Mirrors
• Depends on the position of the object. Use ray
diagrams for different positions.
Uses of Spherical Mirrors
• Concave: shaving mirror, dentist mirror.
• Convex: rearview mirror.
Refraction of Light
• Bending of light when it passes from one
medium to another. Laws of refraction:
• 1. Incident ray, refracted ray, and normal lie in
the same plane.
• 2. Snell’s law: n1sinĪø1 = n2sinĪø2
Refractive Index
• Ratio of speed of light in vacuum to that in the
medium. No unit.
Refraction through Glass Slab
• Emergent ray is parallel to incident ray but
laterally displaced.
Lenses
• Convex and Concave lenses. Terms: optical
center, principal axis, focus, focal length.
Image Formation by Lenses
• Convex lens forms real/inverted or
virtual/upright images depending on object
position.
Lens Formula and Magnification
• 1/f = 1/v - 1/u, magnification = h2/h1 = v/u.
Experiments
• 1. Image formation using spherical mirrors and
lenses.
• 2. Refraction through glass slab and prism.

Grade10_Physics_Lighttttttttttttttt.pptx

  • 1.
    Light: Reflection andRefraction Grade 10 Physics - Detailed Presentation
  • 2.
    Introduction to Light •Light is a form of energy that enables us to see objects. It travels in a straight line.
  • 3.
    Reflection of Light •Reflection is the bouncing back of light from a surface. Laws of reflection: • 1. Angle of incidence = Angle of reflection • 2. Incident ray, reflected ray, and normal lie in the same plane.
  • 4.
    Types of Reflection •Regular reflection (smooth surface) • Diffuse reflection (rough surface).
  • 5.
    Image Formation byPlane Mirror • Virtual, erect, same size, and laterally inverted image formed behind the mirror.
  • 6.
    Spherical Mirrors • Concaveand Convex mirrors. Principal axis, pole, focus, radius of curvature, and center of curvature.
  • 7.
    Image Formation bySpherical Mirrors • Depends on the position of the object. Use ray diagrams for different positions.
  • 8.
    Uses of SphericalMirrors • Concave: shaving mirror, dentist mirror. • Convex: rearview mirror.
  • 9.
    Refraction of Light •Bending of light when it passes from one medium to another. Laws of refraction: • 1. Incident ray, refracted ray, and normal lie in the same plane. • 2. Snell’s law: n1sinĪø1 = n2sinĪø2
  • 10.
    Refractive Index • Ratioof speed of light in vacuum to that in the medium. No unit.
  • 11.
    Refraction through GlassSlab • Emergent ray is parallel to incident ray but laterally displaced.
  • 12.
    Lenses • Convex andConcave lenses. Terms: optical center, principal axis, focus, focal length.
  • 13.
    Image Formation byLenses • Convex lens forms real/inverted or virtual/upright images depending on object position.
  • 14.
    Lens Formula andMagnification • 1/f = 1/v - 1/u, magnification = h2/h1 = v/u.
  • 15.
    Experiments • 1. Imageformation using spherical mirrors and lenses. • 2. Refraction through glass slab and prism.