Reflection of Light Quiz - CBSE Class 9 Science

Free practice quiz: Reflection of Light (CBSE Class 9 Science). 10 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. What is the law of reflection?

   1. The angle of incidence is equal to the angle of reflection.
   2. The angle of incidence is greater than the angle of reflection.
   3. The angle of incidence is less than the angle of reflection.
   4. All angles are equal to 90 degrees.
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   Answer: A. The angle of incidence is equal to the angle of reflection.

   The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.

2. What happens to light when it reflects off a smooth surface?

   1. It scatters in all directions.
   2. It bends at an angle.
   3. It reflects in a uniform direction.
   4. It absorbs into the surface.
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   Answer: C. It reflects in a uniform direction.

   On a smooth surface, light reflects in a single, uniform direction due to specular reflection.

3. Which one of these surfaces would reflect light the most effectively?

   1. A wooden board
   2. A silver-coated mirror
   3. A sandy beach
   4. A cloth curtain
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   Answer: B. A silver-coated mirror

   A silver-coated mirror is highly polished and reflects light effectively, unlike rough surfaces like wood, sand, or cloth.

4. What is the focal point of a concave mirror called?

   1. Focus
   2. Vertex
   3. Center of curvature
   4. Optical pole
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   Answer: A. Focus

   The focal point or focus of a concave mirror is where parallel rays of light either converge or appear to converge after reflecting off the mirror.

5. Why is the rear view mirror in vehicles a convex mirror?

   1. To magnify the images
   2. To provide a wider field of view
   3. To invert the images
   4. To make images appear smaller
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   Answer: B. To provide a wider field of view

   Convex mirrors provide a wider field of view, which makes them suitable for use as rearview mirrors in vehicles.

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