Who invented Radio?
Guglielmo Marconi, an Italian invetor invented Radio in 1890's.
Who invented the mobile phone?
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Who invented the bifocal glasses?
Physical Research Laboratory was founded by ____.
The first gasoline-run car engine was developed by
X-Rays, which are now used on a day to day basis for diagnosis in medicine, was discovered by?
Which dynasty had its capital at Chittorgarh?
Who discovered radioactivity?