6.1 A light ray strikes a reflective plane surface at an angle of 58° with the surface - NSC Technical Sciences - Question 6 - 2023 - Paper 1
Question 6
6.1 A light ray strikes a reflective plane surface at an angle of 58° with the surface.
6.1.1 Define the term reflection.
6.1.2 Label the following:
Light ray OB
A... show full transcript
Worked Solution & Example Answer:6.1 A light ray strikes a reflective plane surface at an angle of 58° with the surface - NSC Technical Sciences - Question 6 - 2023 - Paper 1
Step 1
Define the term reflection.
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Answer
Reflection is the change in direction of a wave upon striking the interface between two materials, often described as the bouncing back of a wave when it encounters a boundary.
Step 2
Label the following:
Light ray OB.
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Answer
The light ray can be labeled as OB, which is the incident ray striking the surface at an angle.
Step 3
Label the following:
Angle 1.
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Answer
Angle 1 is defined as the angle of incidence, which is the angle formed between the incident ray (OB) and the normal at the surface.
Step 4
Label the following:
Angle 2.
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Angle 2 is identified as the angle of reflection, which is formed between the reflected ray and the normal.
Step 5
State the relationship between angle 1 and angle 2.
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Answer
According to the law of reflection, angle 1 (angle of incidence) is equal to angle 2 (angle of reflection):
extAngle1=extAngle2
Step 6
Name the phenomenon observed in the diagram.
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The phenomenon observed in the diagram is known as refraction.
Step 7
State TWO applications of the phenomenon in QUESTION 6.2.1.
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Optical fibers in telecommunications to transmit data over long distances.
Automotive rain sensors that detect moisture on windshields.
Step 8
Write down TWO conditions for the phenomenon in QUESTION 6.2.1.
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The light must be traveling from a denser medium to a less dense medium (e.g., from glass to air).
The angle of incidence must be greater than the critical angle.
Step 9
Name the type of lens used in the diagram.
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The lens used in the diagram is a convex lens.
Step 10
State TWO properties of the image formed by the lens in QUESTION 6.3.1.
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The image is real and inverted.
The image is enlarged as the object is placed between F and 2F.
Step 11
Give TWO uses of the lens in QUESTION 6.3.1.
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Used in magnifying glasses to enlarge images for better visibility.
Used in optical microscopes for viewing small specimens.
Step 12
Give a reason why NO IMAGE is formed when the object is placed at F.
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No image is formed when the object is placed at F because the rays passing through the optical center are parallel and will not converge or diverge to form an image.
