Short-sightedness, also known as myopia, can be corrected by using concave (minus) lenses in glasses or contact lenses. These lenses help to diverge light rays before they enter the eye, allowing them to focus correctly on the retina instead of in front of it.

The meeting of Foreign Ministers of the member states of the Shanghai Cooperation Organization (SCO) Afghanistan contact group was held on July 14, 2021, in Tashkent, Uzbekistan.

The neutron was discovered by James Chadwick in 1932. He conducted experiments that led to the identification of the neutron, a neutral particle within the atomic nucleus, which was a major milestone in the field of nuclear physics.

The United Kingdom's Parliament declared a climate change emergency on May 1st, 2019. This was the first national parliament in the world to do so, marking a significant step in acknowledging the urgency of addressing climate change.

The head of the Nehru Report Committee was Motilal Nehru. The report, which was drafted in 1928, was a proposal for constitutional reforms in India and was named after Motilal Nehru, who chaired the committee responsible for drafting it.

The process in which a heavy nucleus splits into two lighter nuclei is called nuclear fission. This process releases a significant amount of energy and is the principle behind nuclear reactors and atomic bombs.

World Environment Day: Established by the United Nations to raise awareness and encourage action for environmental protection.

Nadir Shah, the ruler of Persia (modern-day Iran), invaded India in 1739 during the reign of Mughal Emperor Muhammad Shah. His invasion led to the sacking of Delhi and the acquisition of immense wealth, including the famous Peacock Throne and the Koh-i-Noor diamond.

The Diamer-Bhasha Dam is being built on the Indus River in northern Pakistan. This large-scale hydroelectric project is intended to enhance water storage, generate electricity, and help with flood control.

The 3rd June Plan, also known as the Mountbatten Plan, was announced by Lord Louis Mountbatten, the last Viceroy of British India, on June 3, 1947. This plan outlined the partition of British India into two independent dominions, India and Pakistan.

The Dorah Pass connects Chitral in Pakistan with Afghanistan. This mountain pass, situated in the Hindu Kush range, provides a route between Chitral and Badakhshan Province in Afghanistan.

Kazakhstan officially renamed its capital Astana as Nur-Sultan in honor of Nursultan Nazarbayev, the country's first president, on March 23, 2019.

The shortest wavelength for audible sound depends on the upper limit of the human hearing range and the speed of sound.

• The upper frequency limit for human hearing is typically around 20,000 Hz (20 kHz).
• The speed of sound in air is approximately 343 meters per second.

Using the formula Wavelength=Speed of Sound/Frequency

Wavelength = 343 m/s /20,000 Hz

Wavelength = 0.01715 meters

=1.715 cm

So, the shortest wavelength for audible sound is approximately 1.715 centimeters.

China hosted the Conference on Dialogue of Asian Civilizations on May 15th, 2019. The conference took place in Beijing and aimed to promote cultural exchanges and mutual understanding among Asian countries.

Tipu Sultan, the ruler of the Kingdom of Mysore, requested Napoleon Bonaparte's help to drive the British out of India. Tipu Sultan sought an alliance with France in his struggle against British colonial expansion in India. Napoleon, who was at that time in Egypt, expressed interest, but the plan never materialized.

Under the Legislative Councils Act of 1861, the Viceroy was empowered to issue ordinances for the government of British India in emergency situations. These ordinances could be issued without the concurrence of the Legislative Council and were valid for six months.

In the Provincial elections of 1946, the All India Muslim League won 425 out of 496 Muslim seats. This victory was significant as it demonstrated the League's dominance among Muslim voters and its demand for the creation of Pakistan.

The headquarters of the International Monetary Fund (IMF) is located in Washington, D.C., United States.

The first ever meeting between North Korean Leader Kim Jong Un and U.S. President Donald Trump was held in Singapore on June 12, 2018. This summit marked a significant moment in U.S.-North Korea relations.

CPEC, or the China-Pakistan Economic Corridor, is the flagship project of the Belt and Road Initiative (BRI), which is China's global development strategy aimed at enhancing trade and stimulating economic growth across Asia and beyond.

The United Kingdom was the first country to approve the Oxford-AstraZeneca COVID-19 vaccine. The UK’s Medicines and Healthcare products Regulatory Agency (MHRA) granted emergency use authorization for the vaccine on December 30, 2020.

The headquarters of the Financial Action Task Force (FATF) is located in Paris, France.

The ruins of Harappa are located near the modern city of Sahiwal in Punjab, Pakistan. Harappa was one of the major cities of the ancient Indus Valley Civilization, which flourished around 2600 to 1900 BCE.

British Airways resumed operations to Pakistan in June 2019 after a suspension of nearly 11 years. The airline had suspended its flights to Pakistan in 2008 following the Marriott Hotel bombing in Islamabad.

Narendra Modi took oath as the Prime Minister of India for a second term on May 30, 2019.

The first Prime Minister of Pakistan was Liaquat Ali Khan. He served as Prime Minister from August 15, 1947, until his assassination on October 16, 1951. He was a close associate of Muhammad Ali Jinnah and played a significant role in the creation of Pakistan.

The site Kekra is an offshore drilling location in the Arabian Sea, near the coast of Pakistan. It was the site of a significant exploration effort by a consortium of companies, including Pakistan's Oil and Gas Development Company Limited (OGDCL) and international firms like ExxonMobil and ENI, to search for oil and gas reserves. However, the drilling at Kekra-1 did not yield commercially viable quantities of hydrocarbons.

The first female ambassador of Saudi Arabia to the United States is Princess Reema bint Bandar Al Saud. She was appointed to the position in February 2019.