GK Class 7th

full form of DVD

• Do Very Diligently

• Digital Versatile Disc

• Dam Versus Disc

• Digital Versatile Dance

The First CD invented by

• Klass Compaan & Pete Kramer

• Bill Gates

• Steve Jobs

• James T Russell

Windsor Castle Located in

• English County of Berkshire

• Australia

• basin stroke England

• India

Russell's Invention known as

• Optical Digital Recording

• Optical Disc Recording

• Operational Disc Recording

• Optical Digital Reversing

Who invented Camera Obscura

• Johann Zahn

• Joseph Nicephore Niepce

• Ibn Al Haytham

• Alexander Wolcott

when were the dry plates invented

• 1856

• 1855

• 1857

• 1858

What is the meaning of envisaged

• conceive of as a not a desirable future event.

• Good opinion

• conceive of as a possibility or a desirable future event.

• bad opinion