Light (8 Science)
Explore the properties of light, reflection, refraction, and the human eye. Understand how light enables vision and interacts with different materials.
TL;DR: Explore the properties of light, reflection, refraction, and the human eye. Understand how light enables vision and interacts with different materials…
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Explore the properties of light, reflection, refraction, and the human eye. Understand how light enables vision and interacts with different materials.
Light MCQs with Answers & Explanations
Q1. What is light?
- Sound waves
- Electromagnetic radiation ✓ (correct)
- Mechanical waves
- Thermal energy
Q2. What is the speed of light in vacuum?
- 340 m/s
- 300,000 km/s ✓ (correct)
- 1000 m/s
- 100,000 km/s
Q3. What is reflection of light?
- Bending of light
- Bouncing back of light from a surface ✓ (correct)
- Absorption of light
- Passing through a material
Q4. What is refraction of light?
- Bouncing of light
- Bending of light when passing from one medium to another ✓ (correct)
- Absorption of light
- Scattering of light
Q5. What is the function of the cornea in the eye?
- Controlling light entry
- Refracting light ✓ (correct)
- Focusing light onto retina
- Detecting light
Q6. What is the function of the iris in the eye?
- Refracting light
- Controlling the amount of light entering the eye ✓ (correct)
- Detecting light
- Transmitting signals
Q7. What is the function of the retina?
- Refracting light
- Controlling light entry
- Converting light into electrical signals ✓ (correct)
- Adjusting lens shape
Q8. What colors make up white light?
- Red and blue
- All colors of the visible spectrum ✓ (correct)
- Only primary colors
- Only secondary colors
Q9. What is dispersion of light?
- Bending of light
- Splitting of white light into different colors ✓ (correct)
- Bouncing of light
- Absorption of light
Q10. What is a convex lens?
- Thinner in center
- Thicker in center and converges light ✓ (correct)
- Concave on both sides
- Flat lens
Frequently Asked Questions
How does the human eye see objects?
Light reflects from objects and enters the eye through the cornea and pupil. The lens focuses this light onto the retina, where photoreceptors convert it into electrical signals. The brain interprets these signals as images.
Why do different materials have different colors?
Objects appear colored because they absorb certain colors of light and reflect others. A red apple absorbs all colors except red, which it reflects to our eyes.
More 8 Science MCQs
- Light Reflection and Refraction
- Electricity
- Acids Bases and Salts
- Life Processes
- Carbon and its Compounds
- Metals and Non-metals
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