Explanation

 A convex lens is thicker at the centre than at the edges. 

A camera uses a convex lens to focus light rays and form an image on a piece of film or a digital sensor at the back, capturing the scene in front of it.

Explanation

Ibn al-Haytham presented the theory of reflection and refraction of light

He is also known as Alhazen

His work, particularly his "Book of Optics", is titled Kitab al-Manazir, written during 1011–1021.

Born: c. 965 (c. 354 AH) Basra, Buyid Emirate

Died: c. 1040 (c. 430 AH)[1] (aged around 75) Cairo, Fatimid Caliphate

Explanation

• The Moon is a non-luminous object because it does not produce its own light.
• Instead, it reflects the light of the Sun.

Explanation

 An electric generator is a device that converts mechanical energy into usable electrical energy.

This process is based on the principle of electromagnetic induction,

Discovered in 1831 by British scientist Michael Faraday

Explanation

The most popular renewable energy sources currently are:

1.      Solar energy

2.      Wind energy

3.      Hydro energy

4.      Tidal energy

5.      Geothermal energy

6.      Biomass energy

Explanation

Gamma rays have the highest penetrating power among these particles.

Due to their lack of mass and charge.

It allowing them to pass through most materials.

Explanation

• Mercury is mostly made up of iron.
• It's surface covered with craters.
• It has no atmosphere and no moons.
• It's closest to the sun.
• It's smallest planet.

Explanation

Explanation

• An Integrated Circuit (IC) is a tiny electronic device that contains a large number of electronic components.
• Such as transistors, diodes, and resistors, on a single piece of semiconductor material, like silicon.
• It's a crucial component in modern electronics!

Explanation

The output voltage of transformer is greater than input voltage.

then it is known as step up transformer.