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Worksheets12.6 Dispersion of light [Mastery check]
Total questions: 25
Worksheet time: 14mins
A narrow beam of white light passes through a prism and is dispersed into a spectrum. Which row is correct in describing colour of beam 1, 2, and 3?
blue, yellow, red
red, blue, yellow
red, yellow, blue
yellow, blue, red
A beam of light consists of yellow and blue light. The beam of light is incident on a glass prism. Which diagram is correct? (a)
A beam of white light is split into a spectrum of seven colours.
Which name is given to this process?
diffraction
dispersion
reflection
refraction
The diagram shows a beam of white light passing through a triangular prism. A spectrum is produced.
Which row correctly shows a wave property involved in producing the colours at X and Y, and colours of X and Y?
diffraction - red - violet
dispersion - red - violet
reflection - violet - red
refraction - violet - red
White light can be split into different colours by passing it through a prism.
What is the name of this process?
diffraction
dispersion
reflection
total internal reflection
The diagram shows white light passing through a prism.
Which description of what happens as the light passes into the prism is correct?
The speed of the red light is less than the speed of the violet light and the red light is the least refracted.
The speed of the red light is greater than the speed of the violet light and the red light is the least refracted.
The speed of the violet light is less than the speed of the red light and the violet light is the least refracted.
The speed of the violet light is greater than the speed of the red light and the violet light is the least refracted.
A ray of green light passes through a glass prism as shown.
Which colours of light refract more than green and refract less than green?
red, blue
red, yellow
violet, blue
violet, yellow
Two beams of light are both the same colour of red. One beam is travelling through air. The other beam is travelling through water. Each beam has a different brightness.
Which quantity is the same for both sets of waves?
amplitude
frequency
speed
wavelength
Which diagram correctly shows the dispersion of white light through a glass prism?
(a)
Red, green and violet lights are part of the visible spectrum of light.
What is the order of colours from shortest to longest wavelength?
red → green → violet
red → violet → green
violet → red → green
violet → green → red
A beam of light from the Sun strikes a prism.
The dispersed beam is incident on a white wall between X and Y. Which colours are seen at X, Z and Y?
X: red, Z: green, Y: violet
X: red, Z: violet, Y: green
X: violet, Z: green, Y: red
X: violet, Z: red, Y: green
The diagram shows the effect of a prism on white light.
Some light is reflected on striking the prism and some is refracted and dispersed to form a spectrum.
What happens if monochromatic light is used instead of white light?
The light changes colour as it passes through the prism.
The light forms a brighter spectrum.
There is no reflected light.
There is no dispersion of the emerging light.
A narrow beam of white light passes through a prism and is dispersed into a spectrum.
Which row is correct?
colour 1: blue, colour 2: yellow, colour 3: red
colour 1: red, colour 2: blue, colour 3: yellow
colour 1: red, colour 2: yellow, colour 3: blue
colour 1: yellow, colour 2: blue, colour 3: red
Which statement describes monochromatic light?
light of a single frequency
light transmitted by a transparent prism
visible light
white light
A monochromatic ray of green light in air enters a block of glass. Which property of the ray of light always remains the same as it moves from air to glass?
wavelength
speed
frequency
direction
The diagram shows radiation from a lamp passing through a prism. Which type of radiation is found at P?
γ-rays
infrared
ultraviolet
X-rays
Which diagram shows the dispersion of white light by a glass prism?
The table shows information about different colours of light.
Using the data, what is the frequency of orange light?
4.0 x 1014 Hz
5.0 x 1014 Hz
6.0 x 1014 Hz
7.0 x 1014 Hz
A beam of light is monochromatic.
What does monochromatic mean?
All the waves in the beam must have the same frequency only.
All the waves in the beam must have the same amplitude only.
All the waves in the beam must have the same speed only.
All the waves in the beam must have the same amplitude, frequency and speed.
What is the correct order of the colours in a spectrum of white light?
blue → green → yellow
blue → yellow → green
yellow → blue → green
green → blue → yellow
A 60° glass prism disperses white light as shown.
The spectrum can be seen emerging from the prism.
Which spectrum shows the colours in the correct order?
violet, green, blue, yellow, orange, red
violet, blue, green, orange, yellow, red
violet, blue, green, yellow, orange, red
violet, green, blue, orange, yellow, red
The diagram shows radiation from a lamp passing through a prism. Which type of radiation is found at P?
γ-rays
infrared
ultraviolet
X-rays
The diagram shows the path of a ray of green light through a glass prism. The angle of deviation is the angle between the incident ray and the ray leaving the prism. When a ray of white light is incident on the prism, it separates into the colours of the visible spectrum.
What is the name of this effect and which colour of light has the smallest angle of deviation?
diffraction, red
diffraction, violet
dispersion, red
dispersion, violet
What is monochromatic light?
Light of a single amplitude
Light of a single frequency
Light of more than one colour
Light which travels with constant velocity.
White light is refracted and dispersed when it enters a glass prism from air. Which colour has the lowest speed as it moves through the glass prism?
blue light
orange light
red light
violet light
