Who discovered ultraviolet radiation in 1801, shortly after Herschel's discovery of infrared? MCQ with Answer and Explanation

Question

Share Report Error

Who discovered ultraviolet radiation in 1801, shortly after Herschel's discovery of infrared?

A. Johann Wilhelm Ritter

B. Heinrich Hertz

C. William Herschel

D. Wilhelm Röntgen

Answer: Option A

Solution (By JKSSB Mock Tests)

Johann Wilhelm Ritter discovered 'chemical rays' (ultraviolet light) by observing how silver chloride reacted to invisible rays past the violet spectrum.

This question belongs to: Static General Knowledge Inventions and Discoveries

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Inventions and Discoveries Questions

Question #1

Share Report

Who discovered that the chemical element Boron is isolated by reacting boric acid with potassium metal?

A. Jöns Jacob Berzelius

B. Humphry Davy

C. Antoine Lavoisier

D. Joseph Louis Gay-Lussac and Louis Jacques Thénard

View Answer & Solution Discuss

Get Complete Subject PDF for Static General Knowledge

Correct Answer: Option D

Explanation:
Gay-Lussac and Thénard independently isolated elemental boron in 1808, around the same time as Sir Humphry Davy.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

Share Report

The invention of the common mechanical device known as the marine depth tracker Echo Sounder was patented by whom?

A. Guglielmo Marconi

B. Alexander Behm

C. Heinrich Hertz

D. Robert Watson-Watt

View Answer & Solution Discuss

Get Complete Subject PDF for Static General Knowledge

Correct Answer: Option B

Explanation:
German physicist Alexander Behm patented the sonic echo sounder depth locator apparatus in 1912 to prevent marine collisions.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3

Share Report

Who discovered the precise value of the physical constant detailing the number of structural units in one mole of material?

A. John Dalton

B. Amedeo Avogadro

C. Jean Perrin

D. Max Planck

View Answer & Solution Discuss

Get Complete Subject PDF for Static General Knowledge

Correct Answer: Option C

Explanation:
While the constant is named after Avogadro, Jean Perrin calculated its exact value through experimental tracking of Brownian motion, winning a Nobel Prize.

This question belongs to: Static General Knowledge Inventions and Discoveries

Explore All Inventions and Discoveries MCQs