Explanation

• Omar-Khayam was the first to develop the Binomial Theorem and determine binomial coefficients.

Additional information:

• Omar-Khayam was born in Iran in 1048 AD.
• He was a famous poet, mathematician, and astronomer.
• He introduced the Jalali Calendar.
• It is also known as the modern Solar Hijri calendar.

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

Explanation

• Wilhelm Conrad Rontgen discovered X-rays
• He was discovered on 8 November 1895.
• He got the Nobel Prize in Physics in 1901.

Additional questions

• The penetrating power of X-rays depends on their frequency

Last updated 26-07-2026 by NA

Explanation

• Inventor: Thomas Alva Edison.
• Country: United States.
• Practical incandescent bulb: 1879.
• Other contributions: Electric power, sound recording, motion pictures.
• Famous invention: Phonograph.

Last verified on 03-09-2026

Explanation

• The Hubble Space Telescope is a joint project of NASA (USA) and ESA (European Space Agency).
• It was launched in 1990 into low Earth orbit.
• Scientists like John C. Mather contributed to its development and research.
• It is used for observing distant galaxies and space objects.

Last verified on 08-06-2026