LIGHT

A. Reflection of light
B. Refraction of light
C. Thin lenses

Objectives

• Recall and use the terms for reflection, including normal, angle of incidence and angle of reflection.
• State that, for reflection, the angle of incidence is equal to the angle or reflection and use this principle in constructions, measurements and calculations
• Recall and use the term for refraction, including normal, angle of incidence and angle of refraction.
• Define refractive index of a medium in terms of the ratio of speed of light in vacuum and in the medium
• Explain the terms critical angle and total internal reflection.
• Identify the main ideas in total internal reflection and apply them to the use of optical fibers in telecommunication and state the advantages of their use.
• Describe the action of mirror ( both concave and convex) on a beam of light
• Describe the action of thin lens ( both converging and diverging) on a beam of light.
• Define the term focal length for a converging lens
• Draw ray diagram to illustrate the formation of real and virtual images of an object by a thin converging lens