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

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