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Dispersion of light and colours - Jamb Physics Past Questions and Answers

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Jamb Physics Past Questions

Question 6:


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


Question 7:


Dispersion of light by a glass prism is due to the

A. Different colours of the glass
B. Different speeds of the various colours in glass
C. Defects in the glass
D. High density of glass


Question 8:


When light is incident on an object which is magenta in colour, which of the following colour would be absorbed?

A. Red and blue
B. Green only
C. Red and green
D. Red only


Question 9:


Which of the following correctly explain(s) why a green leaf appears green in bright day light? i. it absorbs only the green component of sunlight. ii. it absorbs all colour of sunlight except green. iii. it reflects only the green component of sunlight.

A. I only
B. Ii only
C. I and iii only
D. Ii and iii only


Question 10:


Which of the following pairs of colours gives the widest separation in the spectrum of white light?

A. Red and Violet
B. Green and Yellow
C. Red and Indigo
D. Yellow and Violet






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