Explanation

• “Isra” means Night Journey in Arabic.
• It refers to the blessed journey of Prophet Muhammad ﷺ from Makkah to Jerusalem.
• This event is part of Isra wal Mi’raj.
• It is mentioned in the Holy Qur’an in Surah Al-Isra.
• The journey happened in a single night by Allah’s command.

Last verified on 13-06-2026

Explanation

When white light passes through a prism, it splits into 7 colors, forming a spectrum known as a rainbow:

1. Red
2. Orange
3. Yellow
4. Green
5. Blue
6. Indigo
7. Violet

The separation of visible light into its different colours is known as dispersion.

Last verified on 08-06-2026

Explanation

• The Cerebellum controls body balance and coordination.
• It helps in smooth movement of muscles.
• It is also involved in simple learned (conditioned) responses.
• It works with other brain parts to maintain posture.
• Damage to it causes loss of balance and shaky movements.

Last verified on 07-06-2026

Explanation

• The SI unit of energy is the Joule (J).
• It is the unit of energy, work, and heat.

Additional information:

• 1 Joule (J) = 1 Newton × 1 meter
• Calorie – 1 cal = 4.184 J
• Kilowatt-hour (kWh) – 1 kWh = 3.6 × 10⁶ J
• Electronvolt (eV) – 1 eV ≈ 1.602 × 10⁻¹⁹ J
• Erg (CGS unit) – 1 erg = 10⁻⁷ J

Last verified on 17-01-2026

Explanation

• This core concept is known as Boyle's Law.

  • Relation: Pressure ∝ 1/Volume
  • Pressure ↑ → Volume ↓
  • Pressure ↓ → Volume ↑
  • They have an inverse relationship.
  • Formula: P_1V_1=P_2V_2
  • This means Pressure × Volume = Constant 

Explanation

Explanation

• Iron is essential for hemoglobin formation.
• About 70% of the body's iron is in hemoglobin and myoglobin.
• Function → oxygen transport.
• Structure → Quaternary.
• Main component → Fe²⁺.
• B6 deficiency → ↓ hemoglobin.
• Heme → Protoporphyrin IX + Fe²⁺.
• Adult Hb level → 1st year.
• Fe³⁺ → not normal in Hb.
• Location → Red blood cells.

Explanation

• Gamma rays have the shortest wavelength in the electromagnetic spectrum.
• Wavelength: Shorter than 0.01 nanometers (smaller than an atom's nucleus)
• Energy & Frequency: Highest frequency and highest photon energy of any wave type.
  
• Origin: Created by radioactive atomic nuclei decay 
• They are used in medical treatments and scientific research.

Explanation

• Vitamin C deficiency → Scurvy
• Causes bleeding gums and poor wound healing.
• Vitamin C is important for collagen formation.
• Main sources: Citrus fruits, guava, tomatoes, and vegetables.

Explanation

• Fluorescent lamps consist of glass tubes filled with a mixture of argon and mercury vapor.
• Mercury vapour → produces ultraviolet (UV) light.
• Phosphor coating → converts UV into visible light.
• Argon gas → helps start and maintain the discharge.
• Electrodes → emit electrons.
• Ballast/choke → controls the current.