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CDS · Physics
PC07 — Optics — Quiz
CDS
20 Questions
No Negative Marking
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Question 1
The speed of light in vacuum is:
A
3 × 10⁶ m/s
B
3 × 10⁸ m/s
C
3 × 10¹⁰ m/s
D
3 × 10⁵ km/s
Question 2
The focal length of a concave mirror is:
A
Positive
B
Negative (by sign convention)
C
Zero
D
Infinite
Question 3
Total internal reflection occurs when light travels from:
A
Rarer to denser medium at any angle
B
Denser to rarer medium at angle greater than critical angle
C
Denser to rarer medium at any angle
D
Rarer to denser medium at angle greater than 45°
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