herapathite वाक्य
"herapathite" हिंदी में herapathite in a sentenceउदाहरण वाक्य
- In the 1930s, Prof . Ferdinand Bernauer invented a process to grow single herapathite crystals large enough to be sandwiched between two sheets of glass to create a polarizing filter; these were sold under the Bernotar name by Carl Zeiss.