Explanation

Gamma rays are the highest energy photons, with energies typically above 100,000 electronvolts (eV).

They are a type of electromagnetic radiation, like X-rays and visible light, but with much shorter wavelengths and higher frequencies.

Explanation

A pinhole camera works without lenses.

It uses a small aperture (pinhole) to project an inverted image of the scene onto the opposite surface.

Explanation

The sand commonly used to make glass is comprised of small grains of quartz crystals, made up of molecules of silicon dioxide, which is also known as silica.

Explanation

Solids are packed together tighter than liquids and gases, hence sound travels fastest in solids

Sound can not travel through vaccum 

Explanation

It is an ionic compound with the chemical formula NaCl.

It representing a 1:1 ratio of sodium and chloride ions. 

Table salt is the granulated white salt seen in most saltshakers.

It is typically mined from underground deposits.

It is commonly known as Sodium chloride.

Explanation

In isometric contraction, muscle length remains the same while tension increases.

No visible movement occurs, as seen in activities like holding a plank or pushing against a wall.

Explanation

Glass is an insulator because it does not allow electricity to pass through easily.

Silver, copper, and aluminum are conductors, meaning they allow electric current to flow.

Explanation

Vitamin D toxicity, also called hypervitaminosis D.

It causes hypercalcemia and renal failure.

Daily Vitamin D requirement is 200–600 IU.

While skin produces up to 10,000 IU after full UV exposure.

Explanation

Scotograph is an instrument used for aiding the blind to write.

It helps visually impaired individuals in forming letters and words by providing a tactile guide.

Explanation

Chloroquine is a medication used to prevent and treat malaria.

It is a disease caused by parasitic protozoans.

It is commonly used as an anti-malarial drug.

It has been widely used for decades.

Chloroquine was discovered in 1934.