(a) Dispersion of light and colours - Jamb Physics Past Questions and Answers

Question 6:

• JAMB 1984

What is the apparent colour of a RED SHIRT when viewed in PURE green light?

A. Red
B. Green
C. Yellow
D. Black
E. Blue

Question 7:

• JAMB 1984

The spectrum of white light consists of coloured lights arranged in the following order

A. Blue, red, green, yellow, indigo, violet, orange
B. Red, orange, yellow, green, blue, indigo, violet
C. Red, orange, yellow, indigo, green, blue, violet
D. Indigo, green, blue, violet, yellow, red, orange
E. Yellow, blue, green, violet, orange, indigo, red

Question 8:

• JAMB 1985

A narrow beam of white light can be split up into different colours by a glass prism. The correct explanation is that

A. White light is an electromagnetic wave
B. The prism has all the colours of the white light
C. White light has undergone total internal reflection in the prism
D. Different colours of white light travel with different speeds in glass
E. White ligth consist of yellow, green and red colours

Question 9:

• JAMB 1988

When white light is dispersed by a spectrometer, the component having the shortest wavelength is

A. Orange
B. Green
C. Violet
D. Red

Question 10:

• JAMB 1988

A spectrum of sunlight is said to be impure when

A. It is made of only three colours
B. It has no red colour in it
C. The different colours in it overlap
D. It does not contain white light