LED Lighting — Questions and answers

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What important part of the light-emitting process did Oleg Losev's work identify?

Choices

  1. The hot filament
  2. The p-n junction ✓
  3. The brightness of the light
  4. The color of the electricity

Answer: The p-n junction

From page 3

Who invented the first practical LED that made visible red light in 1962?

Choices

  1. Nick Holonyak Jr. ✓
  2. Dr. Martha Jones
  3. Henry Joseph Round
  4. Oleg Losev

Answer: Nick Holonyak Jr.

From page 5

Who finally made the first high-brightness blue LED, completing the RGB spectrum?

Choices

  1. Shuji Nakamura ✓
  2. Kaito
  3. Marie Curie
  4. Dr. Kenji Tanaka

Answer: Shuji Nakamura

From page 8

Besides lighting up buildings, what other amazing things can LEDs help with?

Choices

  1. Making cars drive themselves.
  2. Helping plants grow and powering communication. ✓
  3. Cleaning dirty water.
  4. Creating new types of food.

Answer: Helping plants grow and powering communication.

From page 10