Define refraction.
Name angle X.
Write down the value of angle X.
Name the angle marked as 25°.
How is the speed of the light ray affected as it moves from the g... show full transcript
Worked Solution & Example Answer:Define refraction - NSC Technical Sciences - Question 6 - 2022 - Paper 1
Step 1
Define refraction.
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Answer
Refraction is the bending of light when it passes from one medium to another, typically caused by a change in optical density.
Step 2
Name angle X.
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Answer
Angle X is the angle of incidence.
Step 3
Write down the value of angle X.
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Answer
Angle X is 25°.
Step 4
Name the angle marked as 25°.
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Answer
The angle marked as 25° is the angle of incidence.
Step 5
How is the speed of the light ray affected as it moves from the glass block into the air? Write down only INCREASES, DECREASES or NO EFFECT.
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Answer
DECREASES.
Step 6
Name the following rays: 6.1 AB.
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Answer
Ray AB is the incident ray.
Step 7
Name the following rays: 6.2 BC.
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Answer
Ray BC is the refracted ray.
Step 8
Name the following rays: 6.3 CD.
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Answer
Ray CD is the emergent ray.
Step 9
Which ONE of the two media, AIR or GLASS, is optically denser? Give a reason for the answer. Refer to the NORMAL and SPEED OF LIGHT.
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Answer
GLASS is optically denser than AIR because light travels slower in glass than in air, causing the light to bend towards the normal when entering glass.
Step 10
State THREE uses of total internal reflection.
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