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The diagram shows a ray of light incident on a glass block - Edexcel - GCSE Physics - Question 3 - 2012 - Paper 1
Question 3
The diagram shows a ray of light incident on a glass block. (a) (i) At which point is the ray of light shown likely to leave the glass block? Put a cross (X) in the... show full transcript
Worked Solution & Example Answer:The diagram shows a ray of light incident on a glass block - Edexcel - GCSE Physics - Question 3 - 2012 - Paper 1
Step 1
At which point is the ray of light shown likely to leave the glass block?
Answer
The ray of light will likely leave the glass block at point C. This is because as the light emerges from the denser glass medium to the less dense air, it will refract away from the normal line, typically exiting at this point.
Step 2
Complete the sentence by putting a cross (X) in the box next to your answer.
Answer
The ray of light changes direction when it enters the glass block because there is a change of C speed. This is due to the change in the light's velocity as it moves from air into the glass, affecting its direction according to Snell's law.