- 1. Which of the following is a primary colour of light?
A) Black
B) Red
C) White
D) Yellow
- 2. Which colour is not in the spectrum of white light?
A) Indigo
B) Violet
C) Cyan
D) Blue
- 3. What colour is produced when red and blue light are mixed?
A) Yellow
B) Cyan
C) Green
D) Magenta
- 4. When a ray of white light passes through a prism, the colour which gets deviated the least is
A) red.
B) blue.
C) orange.
D) violet.
- 5. The splitting of white light into the different coloured lights by a prism is called
A) refraction.
B) diffusion.
C) total internal reflection.
D) dispersion.
- 6. Among the following four components of light, which one travels slowest in glass?
A) Red
B) Orange
C) Green
D) Blue
- 7. Red light cannot be dispersed by a glass prism because it
A) does not have any component colours
B) travels at a high speed in glass.
C) has a long wavelength.
D) is not refracted in glass.
- 8. Green, blue and red lights are shone onto a white object. The colour of the object will be
A) magenta.
B) blue.
C) white.
D) yellow.
- 9. A red apple appears _____ under a beam of blue light.
A) white
B) yellow
C) magenta
D) black
- 10. A lady was seen wearing a blue dress with black stripes under a blue light. What is the actual colour of dress that she could be wearing?
A) Cyan dress with green stripes.
B) Red dress with yellow stripes.
C) Yellow dress with green stripes.
D) Magenta dress with cyan stripes.
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