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Question 1 of 12
1. Question
1 point(s)
The diagram above shows that a light ray propagates from water into the air at an angle of incident, 40°. What is the value of s? [Refractive index of water, n = 1.33]CorrectIncorrect -
Question 2 of 12
2. Question
1 point(s)It is known that the speed of light in vacuum = 3.0 x 10⁸ ms-1. If the refractive index of water is 1.33, find the speed of light in water.
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Question 3 of 12
3. Question
1 point(s)A glass block appears to be 2cm thick when viewed from above. Find the actual thickness of the block if the refractive index of the glass is 1.6.
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Question 4 of 12
4. Question
1 point(s)
A swimming pool will appear shallower when observed from the poolside. This phenomenon is owing to
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Question 5 of 12
5. Question
1 point(s)
A ray of light passes from water to air. Which arrows in the diagram show the direction of the ray in air?CorrectIncorrect -
Question 6 of 12
6. Question
1 point(s)Which of the followings is TRUE about a light ray moving from an optically less dense medium to an optically denser medium?
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Question 7 of 12
7. Question
1 point(s)
The figure shows a ray of light entering from air into water. Which of the following is correct about the comparison of the speed of light in air and water.CorrectIncorrect -
Question 8 of 12
8. Question
1 point(s)
The figure shows a light ray heading towards a glass block at an angle, θ. Among p, q, r and s, which one is the critical angle of the glass?
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Question 9 of 12
9. Question
1 point(s)
The figure shows a light ray experiencing total internal reflection when moving from water to air. Which of the followings statements is true about this phenomenon?
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Question 10 of 12
10. Question
1 point(s)Which of the phenomena below is related to total internal reflection?
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Question 11 of 12
11. Question
1 point(s)Which of the following optical instruments is functioning on the principle of total internal reflection?
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Question 12 of 12
12. Question
1 point(s)The refractive index of a glass is 1.5. What is the critical angle of the glass?
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