Explanation

Sunlight travels at the speed of light.

Sunlight an average of 8 minutes and 20 seconds to travel from the Sun to the Earth.

Light from Sun travels a distance of  150 Million km before it reaches Earth

Moonlight an average of 1.3 seconds to travel from the moon to the Earth.

ND16-3-2023

Explanation

• Short-sightedness (myopia) can be corrected by wearing a concave lens.
• It is thinner in the center than at the edges.
• This lens disperses light rays, allowing them to focus correctly on the retina.

Explanation

"That" is used to point out a specific noun (blue car), making it a demonstrative adjective.

Indefinite adjectives (e.g., some, many) do not specify a particular noun.

Explanation

Explanation

• When an object reflects all the component colors of light, it appears white.
• This is because the object is reflecting all the wavelengths of visible light, which are then perceived by our eyes as white.
• If an object absorbs all seven colors of light (i.e., all the wavelengths of visible light), it appears black.

Explanation

1 kilocalorie (kcal) = 4184 joules, commonly used in food energy.

1 calorie (cal) = 4.184 joules, so 1000 cal = 4184 J.

Explanation

The poem "In Spite of War" was written by Angela Morgan, an American poet.

It highlights hope, beauty, and resilience even during times of war.

Explanation

The K orbit, also known as the first electron shell.

• It can hold a maximum of 2 electrons.

The L orbit, also known as the second electron shell.

• It can hold a maximum of 8 electrons.

The M orbit, also known as the third electron shell.

• It can hold a maximum of 18 electrons.

Explanation

حسین کا ہم قافیہ لفظ "جبین" ہے، جو کہ دونوں الفاظ ایک ہی آواز کے ساتھ ختم ہوتے ہیں۔

جبین کا مطلب پیشانی یا ماتھا ہوتا ہے۔

Explanation

The proverb "A rolling stone gathers no moss".

It means that a person who is always moving or changing jobs does not settle down

As a result, avoids responsibilities or long-term commitments.