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WorksheetsIS_Section Quiz_14.6–14.7_e
Total questions: 20
Worksheet time: 10mins
Light is a simple term that represents a kind of wave called the electromagnetic wave.
True
False
When white light passes through a prism, dispersion occurs.
True
False
(E) Red, green and yellow are primary colours.
True
False
Infrared radiation exists just beyond the red end of the visible spectrum.
True
False
The wavelength of microwave is shorter than visible light.
True
False
Waves transfer energy without any transfer of matter.
True
False
Black light is composed of lights of seven distinct colours.
True
False
A hotter object emits more infrared radiation.
True
False
Radar mainly works by making use of the refraction of microwaves.
True
False
We get tanned when our skin absorbs ultraviolet radiation in sunlight.
True
False
Which of the following are EM waves?
(1) Sound wave
(2) Ultraviolet radiation
(3) X-ray
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
(E) The colour an object appears to have is determined by
A. the coloured light it reflects.
B. the coloured light it refracts.
C. the coloured light it disperses.
D. the coloured light it mixes.
Which of the following kinds of electromagnetic waves does the application make use of?
A. Infrared radiation
B. Ultraviolet radiation
C. Radio waves
D. Microwaves
Which of the following kinds of electromagnetic waves does the application make use of?
A. Infrared radiation
B. Ultraviolet radiation
C. Radio waves
D. Microwaves
(E) Magenta can be produced by mixing
A. red and green.
B. red and blue.
C. green and blue.
D. red, green and blue.
Which of the following waves have a longer wavelength than visible lights?
(1) Infrared radiation
(2) Radio waves
(3) Microwaves
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
(E) Which of the following statements about the colour of an object is/are correct?
(1) A white object absorbs all colours in white light.
(2) A black object reflects all colours in white light.
(3) A cyan object reflects blue and green light in white light.
A. (1) only
B. (3) only
C. (1) and (2) only
D. (2) and (3) only
Which of the following kinds of electromagnetic waves does the application make use of?
A. Radio waves
B. Microwaves
C. Infrared radiation
D. Ultraviolet radiation
Which of the following electromagnetic waves can be used to transmit information?
(1) Radio waves
(2) Microwaves
(3) Gamma rays
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
(E) What colour does the object appear?
A. Yellow
B. Green
C. Red
D. Black
