Explanation

• Michael Faraday introduced the concept of the electric field in the 19th century.
• He developed the idea of lines of force to explain how electric charges exert forces on one another.

Additional information:

• James Clerk Maxwell later developed mathematical equations describing electromagnetic fields.

Last verified on 12-10-2026

Explanation

• A solar eclipse can damage the retina if the Sun is viewed directly without proper eye protection.
• The Sun's intense light can cause solar retinopathy, which may result in permanent vision damage.
• During a solar eclipse, use certified eclipse glasses that comply with ISO 12312-2; ordinary sunglasses are not safe.

Additional information:

• A lunar eclipse is safe to view with the naked eye because it involves observing the Moon.

Last verified on 12-10-2026

Explanation

• Saturn is the second-largest planet in the solar system.
• Ganymede (Moon of Jupiter) is the largest satellite in the solar system.

Planets and Natural Satellites:

1. Mercury: 0
2. Venus: 0
3. Earth: 1 (Moon)
4. Mars: 2 (Deimos, Phobos)
5. Jupiter: 95
6. Saturn: 274
7. Uranus: 27

Last verified on 02-05-2026

Explanation

• A rainbow forms when sunlight is refracted, reflected, and dispersed through water droplets in the atmosphere.
• Refraction bends the light, while dispersion separates it into seven colors, creating a rainbow.

Last verified on 10-10-2026

Explanation

• The Moon is Earth’s only natural satellite.
• Diameter – 3,474 km
• Distance from Earth – 384,400 km
• Orbital period – 27.3 days
• Surface gravity – 1/6th of Earth
• First human landing – Apollo 11, 1969

Last verified on 18-03-2026