Properties of Light
Reflection of Light
Refraction of Light
Dispersion of Light
Scattering of Light
Addition and Subtraction of Light
100
True or False: Light moves in a straight line.
True.
100
True or false: An image in a plane mirror is upright.
True.
100
Which of the following happens due to refraction of light?
Bending of straw
100
True or false: White light is made up of only one colour.
False
100
What process cause the change in the colour of the sky throughout the day?
Scattering of light
100
What are these colours called: Red, Blue, Green?
Primary colours
200
Which is faster: light or sound?
Light
200
Which of the following is an application of reflection of light?
Reflective jacket
200
Arrange from most dense to least dense: Air, glass, water.
Most to least dense - Glass, Water, Air
200
Name two processes that occur when white light enters a glass prism.
Refraction of light and dispersion of light
200
Carmen tries to do an experiment involving scattering of light at home. What does the diluted milk in the glass represent?
The sky with small particles that scatter light
200
What secondary colour do we get when we add red and green?
Yellow
300
What type of objects does not allow light to pass through?
Opaque objects
300
What property of an image in a plane mirror is shown below?
An image in a plane mirror is laterally inverted.
300
Why does light refract?
Light moves faster or slower in mediums of different densities.
300
Name all the colours in a spectrum.
Red, Orange, Yellow, Green, Blue, Indigo, Violet
300
What colour lights get scattered the most? Why?
Blue, indigo and violet lights
They have short wavelengths
300
What can I use to subtract coloured lights?
A filter
400
What property of light does the formation of rainbow show?
Light can be dispersed.
400
What is the angle between the incident ray and the reflected ray below?
90o
400
When a ray of light travels from air to glass, does it refract towards the normal or away from normal?
Towards the normal
400
What light is refracted the most? Why?
Violet light because it is the slowest in speed.
400
Why does the sky appear blue at noon?
Sunlight travels a short distance in atmosphere.
Blue light is scattered in our field of vision.
We see blue sky.
400
If I put a cyan filter and a red filter in front of white light, what colour is produced?
No light
500
How do shadows formed?
Light moves in a straight line and cannot go through opaque objects.
500
Complete the following diagram:
Teacher will draw it on the board.
500
Why do stars look like they are twinkling at night?
Stars twinkle due to refraction of light.
Light from stars in space enter the Earth's atmosphere and slow down.
Earth's atmosphere has many layers with different densities.
Light is refracted when it travels from one layer to another.
Since light is bent many times in the atmosphere, the stars look like it is twinkling to its observers on Earth.
500
What happens when white light is passed through two prisms consecutively?
White light is formed at the end
500
Why do we see the sky as red during sunset?
Light from sun travelled a long path in the atmosphere.
Most blue light has been scattered outside our field of vision.
We only see red light in the sky.
500
What colour do I see a yellow flower in blue light?
Black