Grade 12 Physics: Reflection and Refraction
A Grade 12 physics worksheet covering the principles of reflection and refraction of light, including Snell's Law, critical angle, and mirror/lens equations.
Includes
Standards
Topics
Grade 12 Physics: Reflection and Refraction
Name:
Date:
Score:
Read each question carefully and provide clear, concise answers. Show all your work for calculations.
1. Which of the following statements is true regarding the angle of incidence and the angle of reflection?
The angle of incidence is always greater than the angle of reflection.
The angle of incidence is always equal to the angle of reflection.
The angle of incidence is always less than the angle of reflection.
There is no relationship between the angle of incidence and the angle of reflection.
2. When light passes from a less dense medium to a more dense medium, it will:
Bend away from the normal.
Bend towards the normal.
Continue in a straight line without bending.
Be totally internally reflected.
3. The phenomenon where light bounces off a surface is called .
4. The bending of light as it passes from one medium to another is known as .
5. According to Snell's Law, n₁sinθ₁ = .
6. Define the critical angle and explain the conditions under which total internal reflection occurs.
7. A light ray traveling in air (n=1.00) enters a block of glass (n=1.50) at an angle of incidence of 30°. Calculate the angle of refraction.
8. A convex mirror always produces a real, inverted image.
True
False
9. The refractive index of a vacuum is 1.
True
False
10. Observe the diagram below showing light entering water. Label the angle of incidence, angle of refraction, and the normal line.
Match the term with its correct definition.
11. Concave Mirror
a. The angle at which total internal reflection begins.
12. Convex Lens
b. A mirror that converges parallel light rays.
13. Critical Angle
c. A lens that converges parallel light rays.