Primary and Secondary Colours

Q.

In which colour an yellow coloured dress would appear when viewed through a blue filter?

Q.

What colour can be made by mixing blue and red colours in equal proportions?

Q.

When there are little drops of water on TV or mobile screen why do we see colours like red blue green and violet in the droplets.

Q.

How are secondary colours formed?

Q.

Explain the following terms

Complementary colours

Q. Why we take Red, Blue, Green as primary colours we can make any colour by combination of any three colours so why we take Red, blue, green as primary colour

Q. Why to is said that frequency of light remain same in all media

Q.

How speed of different light colour affect refraction or bending when change in medium for red colour it bend very little and violet colour bend very more when passes through prism so how bending works for different light colour?

Q.

A rose appears red in light of all the colours.

1. True
2. False

Q. A green leaf placed in a dark room is illuminated by red light. The leaf will appear to be :

1. green
2. red
3. yellow
4. black

Q. Cyan, yellow and magenta are :

1. primary colors
2. secondary colors
3. white colors
4. tertiary colors

Q.

It is possible to obtain blue, green and red colours by superimposing or combining other colours.

1. True

2. False

Q. A blue flower appears blue in magenta light. In which other secondary light will the blue flower appear blue itself?

Q. If you look through a piece of red-tinted glass, everything is seen in shades of red. Similarly if you look through a price of blue-tinted glass. Everything will be seen in shades of blue.

1. I and III
2. I and II
3. II and III
4. Only I

Q.

Green and red colours are allowed to fall on a white cricket ball simultaneously. What will be the colour of the ball?

1. White

2. Yellow

3. Cyan

4. Magenta

Q. Which of the following are Primary colors ?

1. Red, blue, yellow
2. Red, orange, yellow
3. Red, blue, green
4. Red, green, cyan

Q. When green and red colours are mixed, the colour produced is :

1. Yellow
2. Magenta
3. Indigo
4. Black

Q. Which among the following is a group of primary colours?

1. Yellow, blue and green
2. Red, blue and green
3. Red, green and violet
4. Yellow, green and orange

Q.

White paper looks white in sunlight and red rose looks red in sunlight.

Q. A , B, C are three filters. A transmits red, orange, yellow and green light. B transmits green and blue light and C transmits yellow light. Describe the nature of the light transmitted through:
1. A and C
2. A and B
3. B and C
4. A, B and C

Q. When red glass is heated in dark room, it will seem:

1. black
2. purple
3. green
4. yellow

Q. Is black hairs also donot reflect any light

Q. An object looks red when seen through a piece of red glass. What is the actual colour of the object?

1. Red only
2. White only
3. Either A or B
4. Neither A nor B

Q. What are the primary colours ? Name the three primary colours.

Q. A medium is said to be dispersive, if

1. Light of different wavelength propagate at different speeds
2. Light is gradually bent rather than sharply refracted at an interface between the medium and air
3. Light is never totally internally reflected
4. Light of different wavelengths propagates at same speed but has different frequencies

Q. 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

Q. What is complementary colour?
Give one examples.

Q. a) What do you mean by a complementary colour?
b) Study the following figures and identify P and Q.

Q. The colour of an opaque object is due to the colour it :

1. Reflects
2. Absorbs
3. Refracts
4. Scatters

Q. When we see any object through the hot air over the fire, it appears to be wavy, moving slightly. Explain.