Grade 9 Physics: Reflection and Refraction
Explore the fundamental principles of light reflection and refraction with this comprehensive Grade 9 worksheet, covering laws of reflection, types of mirrors and lenses, and Snell's Law.
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Grade 9 Physics: Reflection and Refraction
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Carefully read each question and provide your best answer. Show all calculations where necessary.
1. Which of the following best describes the Law of Reflection?
The angle of incidence is greater than the angle of reflection.
The angle of incidence is equal to the angle of reflection.
The angle of incidence is less than the angle of reflection.
Light bends towards the normal when entering a denser medium.
2. A concave mirror is used to produce a magnified, upright image. Where must the object be placed?
At the center of curvature (C)
Beyond the center of curvature (C)
Between the focal point (F) and the pole (P)
At the focal point (F)
3. The bending of light as it passes from one medium to another is called .
4. A mirror produces only virtual, upright, and diminished images.
5. Snell's Law relates the angles of incidence and refraction to the of the two media.
6. Draw a ray diagram to show the formation of an image by a plane mirror. Clearly label the incident ray, reflected ray, normal, and angles of incidence and reflection.
7. Explain the difference between specular and diffuse reflection, providing an example for each.
8. A convex lens always forms a real and inverted image.
True
False
9. The critical angle is the angle of incidence at which the angle of refraction is 0 degrees.
True
False
10. A light ray enters water (n=1.33) from air (n=1.00) at an angle of incidence of 30 degrees. Calculate the angle of refraction. (Hint: Use Snell's Law: n1 sinθ1 = n2 sinθ2)
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