Here are some MCQs on Light and Human Eye
1. What is the speed of light in a vacuum?
a) 300,000 km/s
b) 300,000 m/s
c) 300,000,000 m/s
d) 3,000,000,000 m/s
Answer: c) 300,000,000 m/s
2. Which of the following is not a type of electromagnetic radiation?
a) Radio waves
b) X-rays
c) Sound waves
d) Gamma rays
Answer: c) Sound waves
3. Light travels in a straight line because of:
a) Reflection
b) Refraction
c) Diffraction
d) Rectification
Answer: a) Reflection
4. When light passes from a rarer medium to a denser medium, it:
a) Speeds up
b) Slows down
c) Stays the same
d) Changes direction
Answer: b) Slows down
5. The bending of light as it passes from one medium to another is called:
a) Reflection
b) Refraction
c) Diffraction
d) Dispersion
Answer: b) Refraction
