Explanation

• Average Distance: 3,84,400 km
• Orbit Period: 27.3 days
• Moon Diameter: 3,474 km
• Earth Diameter: 12,742 km
• Closest Point (Perigee): ~363,300 km
• Farthest Point (Apogee): ~405,500 km

Last verified on 01-04-2026

Explanation

• Sunlight travels at the speed of light (~3 × 10⁸ m/s).
• Takes 8 minutes 20 seconds on average to reach Earth.
• Sunlight takes approximately 499 seconds to travel from the Sun to Earth.
• Distance traveled: 150 million km from Sun to Earth.
• Moonlight takes only 1.3 seconds to reach Earth.

Last verified on 13-03-2026

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

Explanation

• Myopia (Nearsightedness) is an eye defect in which near objects are clear but distant objects appear blurred.
• It occurs when the image forms in front of the retina instead of on it.
• It is corrected by using a concave (diverging) lens.
• The concave lens helps to shift the image back onto the retina.

Last verified on 01-04-2026

Explanation

• An eclipse occurs when one celestial body blocks another’s light.
• Lunar eclipse happens when Earth’s shadow falls on the Moon.
• Solar eclipse happens when the Moon blocks sunlight reaching Earth.
• These events occur due to alignment of Sun, Earth, and Moon.

Last verified on 01-04-2026

Explanation

• The normal resting heart rate of an adult human is about 70 beats per minute.
• It can vary depending on age, fitness, and health condition.

Additional information:

• Normal adult: 60–100 beats/min
• Athletes: 40–60 beats/min
• Children: 70–120 beats/min
• Infants: 100–160 beats/min

Last verified on 31-03-2026

Explanation

• Jaundice is a condition characterized by yellowing of the skin and eyes.
• It is caused by excess bilirubin due to liver dysfunction or disease.

Last verified on 01-04-2026

Explanation

• Geochemistry focuses on the chemical elements and compounds in Earth materials.
• It helps to understand rocks, minerals, and soil composition.

Last verified on 01-04-2026

Explanation

• Jabir ibn Hayyan, known as the "father of chemistry."
• He was an Arab Chemist.
• Composition of Alchemy was written by Jabir Bin Hayyan.

Notable ideas:

• Use of organic substances in chemistry
• Sulfur-mercury theory of metals
• Science of the balance
• Science of artificial generation

Last verified on 07-02-2026

Explanation

• Dermatology: Study of skin.
• It involves the study of health conditions that may affect the skin, fat hair, nails, and membranes.

Additional information:

• Agrostology: Study of Grasses
• Hematology: Study of blood
• Agronomy: Study of soil management and crop production
• Odontology: Study of teeth
• Arthrology: Study of joints
• Nephrology: Study of kidneys

Last verified on 01-04-2026