Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

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

What are the components of sunlight:

  1. Violet,red,yellow,white,magenta,purple,silver

  2. Violet,blue,green,red,indigo,yellow,orange

  3. Red,yellow,black,orange,silver,violet,blue

  4. Can't be determined
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sunlight is reffered as white light.It consist of seven colours,i.e VIBGYOR

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

Primary colours of light are:

  1. red, yellow, blue

  2. blue, orange, green

  3. red, blue, green

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

Red, blue and green are known as the three primary colours. Those are often regarded as basic colours in nature. By mixing these colours in different proportions, all other colours may be obtained.

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

What are composite colours?

  1. Colours produced by mixing two or more primary colours, in proper proportions.

  2. Colours which combine easily with primary colours

  3. Tertiary colours when mixed in proper proportions

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Red,blue ,green are known as the three primary colours. By mixing these colours in different proportions, we get all other colours. The primary colours, when mixed in proper proportion, give us white light. Any other colour,produced by mixing two or more primary colours, in different proportions, is called a composite colour.

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

____ is an example of a light having a spectrum of 7 colors.

  1. Sunlight

  2. White light

  3. Both A and B

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Isaac Newton was the first person to split sunlight into seven colors using a glass prism. When he tried to split the band of colors further using a second prism placed in the inverted position as compared to that of the first, he observed that the emergent ray was white colored. This gave him an idea that sunlight is made up of 7 colors and any other light that gives a spectrum similar to that of sunlight is often referred to as white light.

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

How many colored components does white light have?

  1. 4

  2. 5

  3. 6

  4. 7
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The prism splits the incident white light into a band of 7 colors. The various colors seen in the band are arranged in a particular sequence of Violet, Indigo, Blue, Green, Yellow, Orange and Red (VIBGYOR).

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

If a newton's colour disc composed of seven colours is rotated at high speed, it appears as 

  1. Seven coloured disc rotating

  2. Few colours merge and only three dominant colours are visible

  3. Colours mix and it appears white

  4. Colours mix giving a sparkling effect
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When newton's colour disc is rotated at high speed it appears white.

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

When the Newton's disc is rotated what happens

  1. The colours fade to white

  2. The colours fade to black

  3. The colours fade to red

  4. The colours fade to blue
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.
When the disc is rotated, the colours fade to white. In this way, Sir Isaac Newton demonstrated that white light is a combination of the seven different colours found in a rainbow.

Hence, the correct answer is OPTION A.

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

What is the sequence of colors obtained on splitting of white light?

  1. VBIGYOR

  2. VIBGOYR

  3. VIBGYOR

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

The sequence of colours obtained on splitting of white light is VIBGYOR- Violet, indigo, blue, green, yellow, orange and red.

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

Sunlight is made up of ____ colors.

  1. 7

  2. 6

  3. 5

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

Isaac Newton was the first person to split sunlight into seven colors using a glass prism. When he tried to split the band of colors further using a second prism placed in the inverted position as compared to that of the first, he observed that the emergent ray was white colored. This gave him an idea that sunlight is made up of 7 colors and any other light that gives a spectrum similar to that of sunlight is often referred to as white light.