Explanation

• Name: NCSA Mosaic
• Released: 1993
• Developed by: National Center for Supercomputing Applications (NCSA)
• Famous for: Making the World Wide Web popular through its graphical interface.

Explanation

Explanation

• First computer program: Ada Lovelace’s algorithm (1843) for Charles Babbage’s Analytical Engine.
  • First widely used high-level programming language: FORTRAN (1957).
  • Machine Language: The earliest machine-level programming language, using binary 0s and 1s.

Explanation

• The United States established the U.S. Space Force on December 20, 2019.
• It became the sixth branch of the U.S. Armed Forces.
• The Space Force operates under the Department of the Air Force, alongside the U.S. Air Force.
• Its main role is to organize and conduct military operations related to space and space-based capabilities.

Last verified on 07-10-2026

Explanation

• Ole Rømer was the first person to experimentally demonstrate that light has a finite speed in 1676.
• He used observations of Jupiter’s moon Io to estimate the speed of light.

Additional information:

• The modern accepted speed of light in vacuum is 299,792,458 m/s.

Last verified on 07-10-2026