Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

Multiple choice newton's colour disc light and the formation of shadows physics

Which of the following most appropriately defines a spectrum?

  1. The band of seven colours is known as spectrum

  2. The process of splitting of white light into seven colours is known as spectrum

  3. The different wavelength of light are termed as spectrum

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Visible range consists of seven different colours i.e, VIBGYOR. The band of these seven colours is known as spectrum.

Multiple choice newton's colour disc light and the formation of shadows physics

Newton's colour disc was invented by whom?

  1. Albert Einstein

  2. Sir Isaac Newton

  3. Sir Isaac Newton and Faraday

  4. Sir Isaac Newton and John Kennedy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Newton's colour disc, as the name suggests, was invented by Sir Issac Newton and is a disc with seven segments in rainbow colours.

Hence, the correct answer is OPTION B. 

Multiple choice newton's colour disc light and the formation of shadows physics

The light of one single colour is called:

  1. monochromatic

  2. multichromatic

  3. dichromatic

  4. polychromatic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Monochrome means single colour. The light of one single colour is monochromatic. White light have seven colours. So it is polychromatic.

Multiple choice newton's colour disc light and the formation of shadows physics

What does Newton's colour disc possess?

  1. 7 segments in rainbow colours

  2. 5 segments in rainbow colours

  3. 4 segments in rainbow colours

  4. 9 segments in rainbow colours
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Newton's colour disc, as the name suggests, was invented by Sir Issac Newton and is a disc with seven segments in rainbow colours.

Hence, the correct answer is OPTION A. 

Multiple choice newton's colour disc light and the formation of shadows physics

Due to which phenomena the combination of red, green and blue forms the same white colour

  1. Due to persistence of vision

  2. Due to reflection

  3. Due to refraction

  4. Due to deviation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Due to persistence of vision the combination of red, green and blue forms the same white color.

Multiple choice newton's colour disc light and the formation of shadows physics

It was the British scientist _______who discovered in 1666 that light consists of seven colours. Fill in the blank.

  1. Henry

  2. John Dalton

  3. <span>Sir Issac Newton</span>

  4. Einstein
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Correct answer is (a) Sir Issac Newton.

In 1666, during one of his optical experiments, Newton passed a beam of sunlight through a glass prism. The glass prism split the light into a band of seven colours on his wall. This phenomena is known as dispersion of light

He called this band of colours the ‘spectrum’. Thus the spectrum is a band of seven colours which is obtained by splitting of white light by a glass prism.

Multiple choice newton's colour disc light and the formation of shadows physics

The discovery of Newton's colour disc proves which of the following statement?

  1. Light is colourless

  2. Light is not colourless

  3. Light has only 1 colour

  4. Light has only 3 basic colours
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The perception of a picture or a color stays in the human brain for a fraction of a second. Newton's color disk is a mechanical device that rotates an array of colors arranged as petals or gradients around an axis and when the disc rotates fast enough the perception of the color changes to white. This is because white light is nothing but the mixture of light of all wavelengths in the visible range.

Sir Isaac Newton used this device to prove the above assertion that white color is the mixture of all colors.

SO Light is not colourless.

Multiple choice newton's colour disc light and the formation of shadows physics

When sun rays are passed through a glass prism it gets

  1. Deviated, but not dispersed

  2. Deviated and dispersed

  3. Dispersed, but not deviated

  4. Neither deviated nor dispersed
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When white light passes through a prism, it undergoes refraction (deviation) and splits into its component colors (dispersion) due to the different refractive indices of the wavelengths.

Multiple choice newton's colour disc light and the formation of shadows physics

Which of the following two colours are complementary colours? 

  1. Red and Gresn

  2. Red and Magenta

  3. Red and Cyan

  4. Yellow and Red
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Red and cyan are complementary colors. When mixed, they produce white light. The other pairs (red-magenta, yellow-red, red-and-green with typo) are not complementary pairs.