The discovery of the cosmic radiation spectrum matching a perfect blackbody source was confirmed by which NASA satellite project? MCQ with Answer and Explanation

Question
The discovery of the cosmic radiation spectrum matching a perfect blackbody source was confirmed by which NASA satellite project?
A. Voyager 1
B. COBE (Cosmic Background Explorer)
C. Hubble Space Telescope
D. Explorer 1
Answer: Option B
Solution (By JKSSB Mock Tests)
The COBE satellite, led by John Mather and George Smoot, measured the CMB radiation perfectly, verifying Big Bang cosmological predictions.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
The invention of the common household incandescent light bulb configuration featuring durable tungsten filaments was patented by whom?
A. Joseph Swan
B. Nikola Tesla
C. Thomas Edison
D. William Coolidge and Irving Langmuir
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Correct Answer: Option D

Explanation:
Coolidge developed ductile tungsten wire processing, and Langmuir filled bulbs with inert gas, extending operation life dramatically.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who discovered that light velocity shifts slightly depending on whether it moves parallel or perpendicular to the Earth's orbit, leading to the famous null result?
A. James Clerk Maxwell
B. Hendrik Lorentz
C. Albert Einstein
D. Albert Michelson and Edward Morley
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Correct Answer: Option D

Explanation:
The Michelson-Morley experiment in 1887 found no evidence of the hypothetical luminiferous aether, laying the ground for relativity.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
Who discovered the specific mathematical constant linking the energy of a photon to its frequency?
A. Max Planck
B. Niels Bohr
C. Albert Einstein
D. Werner Heisenberg
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Correct Answer: Option A

Explanation:
Max Planck discovered Planck's constant ($h$) as part of his derivation of blackbody radiation energy laws.
This question belongs to: Static General Knowledge Inventions and Discoveries
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