Friday Quiz Answers 22/08/2025

1. Who is credited with inventing the telephone in 1876?
   Answer: Alexander Graham Bell.

2. What iconic invention is associated with the Wright brothers?
   Answer: Airplane.

3. Which household item did Mary Anderson invent in 1903 after noticing a problem while riding a streetcar?
   Answer: Windshield Wipers.

4. What groundbreaking invention did Tim Berners-Lee introduce in 1989?
   Answer: The World Wide Web.

5. In which century was the printing press invented?
   Answer: 15th century.

6. Who invented the first practical light bulb?
   Answer: Thomas Edison.

7. What popular adhesive product was accidentally invented while trying to create a super-strong glue?
   Answer: Post-it Notes.

8. What invention, crucial during WWII, is attributed to Hedy Lamarr and George Antheil?
   Answer: Frequency-hopping spread spectrum technology.

9. Which gaming console did Nintendo release in 1983 that revolutionised home gaming?
   Answer: Nintendo Entertainment System (NES).

10. What invention is James Dyson best known for?
    Answer: Bagless vacuum cleaner.

Bright Source Bonus Question

Q. What does CRI stand for in lighting, and why is it important when choosing LEDs?
Answer: Colour Rendering Index (CRI) - Measures how accurately a light source reveals colours compared to natural light. High CRI (80+) is important for true-to-life colour in spaces like retail or photography.