Explanation

A seismograph is an instrument used to detect and record earthquakes.

It consists of a mass attached to a fixed base

During an earthquake, the base moves and the mass does not.

Explanation

Ibn al Haytham is known as the Father of Optics.

His contributions to the field of optics through his monumental seven-volume work, Kitab al-Manazir (Book of Optics), compiled between 1011-1021 AD.

Explanation

Explanation

Explanation

Ophthalmologist means a specialist in the branch of medicine concerned with the study and treatment of disorders and diseases of the eye.

Ophthalmologist means ماہر امراض چشم

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Explanation

A transistor is a semiconductor component that can be used either as a switch or an amplifier.

It controls the flow of electrical current in a circuit and is fundamental in electronic devices.

Explanation

Vexillology is the study of flags.

 Vexillology comes from the Latin word vexilla "little sail" for flag.

Vexillology means جھنڈوں کا مطالعہ

Explanation

• Gamma rays have the highest energy among the options.
• They are electromagnetic waves with extremely high frequency and short wavelength.
• It gives them more energy compared to Alpha, Beta, and X-rays.

Explanation

Phases of the moon occur because we can see only that part of the moon which reflects light towards us.

The changing shape of the bright part of the Moon that we see is called its phase.

The moon is illuminated because it reflects the light from the sun.

The part of the moon facing the sun is lit up.

The part facing away from the sun is in darkness.

Explanation

Location: Paris, France

Drafted: 30 November – 12 December 2015

 Treaty on climate change. Paris Peace Treaty-1947: Agreement that ended WW-2 in 1945.