Explanation

The sky appears blue due to a phenomenon called Rayleigh scattering.

In which shorter (blue) wavelengths of light are scattered more than longer (red) wavelengths by the tiny molecules of gases in the atmosphere, like nitrogen and oxygen.

This scattering effect gives the sky its blue color.

Explanation

Candela (cd) is the SI unit of luminous intensity.

It which measures the amount of light emitted by a light source in a specific direction.

Explanation

Luminous flux is the total amount of visible light emitted by a light source in a unit of time.

It is measured in lumens (lm).

It represents the rate at which light energy is radiated in the form of light waves.

Lux is measures the illuminance, or the amount of light falling on a surface.

Explanation

Magnesium fluoride (MgF2) is a common coating material.

It is used on lenses to reduce glare, reflections, and ghosting.

It is a thin layer that helps increase light transmission and improve image quality.

Explanation

The first color photograph was taken by Thomas Sutton in 1861.

It was taken for a lecture by James Clerk Maxwell.

The photograph was of a bow made of ribbon in different colors.

Explanation

A Candela (cd) is the SI unit of luminous intensity.

It measures the amount of light emitted by a light source in a specific direction.

It is a measure of how bright a light appears to the human eye.

Explanation

The first camera to be used on the moon was the Hasselblad 500EL Data Camera.

It was used by astronauts during the Apollo 11 mission in 1969.

Explanation

A dolly in photography and filmmaking:

• Platform/cart for smooth camera movement
• Moves on tracks or wheels
• Used for dynamic shots (dolly zooms, tracking shots)
• Designed for movement, unlike a heavy tripod for stability

Explanation

Canon's first camera, the Kwanon, was released in 1935.

It was a 35mm focal-plane-shutter camera called the "Kwanon".

It named after the Buddhist Bodhisattva of mercy.

Although the camera never went into mass production.

Explanation

The world's oldest surviving photograph, "View from the Window at Le Gras".

It was taken by Joseph Nicephore Niepce in 1826.

It depicts the view from his window at his estate in Le Gras, France.