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8.3 REFLECTION OF LIGHT

8.3 REFLECTION OF LIGHT

Assessment

Presentation

Science

1st Grade

Hard

NGSS
MS-PS4-2, 1-PS4-2, 1-PS4-3

+1

Standards-aligned

Created by

KASMAWATI Moe

FREE Resource

35 Slides • 27 Questions

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8.3 REFLECTION OF LIGHT

by KASMAWATI Moe

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Light reflection

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What is a light wave?

  • Tiny particles called photons moving very fast.

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How are we able to see things?

  • Light travels in a straight line to an object, bounces off, then travels back to the human eye. We can see!

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Characteristic of a light wave

  • Travels in a straight line

  • Travels very, very fast

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Types of light

  • Natural light: made from Earth

  • Artificial light: made by man

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Properties of a light wave

  • Reflection: light bounces off the object

  • Refraction: bending of light - when the light moves from one medium to another (air to water)

  • Transmitting: light goes through an object

  • Absorbing: Light soaks into something

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How does light travel through objects?

  • tranparent: all light travels through the object.

  • translucent: some light travels through the object.

  • opaque: no light travels through the object

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How do sunglasses help us see?

  • When light hits an object, the light reflects and enters our eyeballs.

  • If the light that is reflected is super bright, we may have to close our eyes or shade our eyes.

  • OR.... WEAR SUNGLASSES!!!

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Multiple Choice

The ray of light that strikes a reflecting surface is called ________.
1
incident ray
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reflected ray
3
normal ray
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none of the above

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Multiple Choice

Light travels in ___________ lines
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wavy
2
bent
3
straight
4
backwards

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Multiple Choice

If the angle of incidence is 45 degree, what is the angle between the incident ray and reflecting surface
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45
2
90
3
180
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none of the above

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Multiple Choice

The imaginary line perpendicular to a reflecting surface is called _____.
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crooked line
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parallel line
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angular line
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normal line

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Multiple Choice

what is the angle between the incident ray and the normal called as
1
angle of incidence
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angle of reflection
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angle of convergent
4
angle of divergent

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Multiple Choice

Law of reflection state that - The angle of incidence is .................. to the angle of reflection.
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equal
2
double
3
half

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Multiple Choice

What is reflection?
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Reflection is the bouncing  of light off the surface that it strikes on.
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Reflection is the absorbing of light off the surface that it strikes on.
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Reflection is the bending of light off the surface that it strikes on.
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Reflection is the scattering of light off the surface that it strikes on.

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Multiple Choice

The ray of light that strikes a reflecting surface is called ________.
1
incident ray
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reflected ray
3
normal ray
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none of the above

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Multiple Choice

The angle produced as a source of light bounces off a reflecting surface is called ______.
1
angle of crookedness
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angle of reflection
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angle of incidence
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angle of bounce

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Multiple Choice

Why can you see most objects? 
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they emit light
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light refracts through them
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light reflects off them
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They absorb light

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Multiple Choice

Question image
What is the line MN called in the given diagram
                               
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incident ray
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reflected ray
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reflecting surface
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normal

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Multiple Choice

what is the angle between the reflected ray and the normal called as
1
angle of incidence
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angle of reflection
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angle of convergent
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angle of divergent

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Multiple Choice

Question image
What does incidence angle equal?
1
reflection angle
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∠C
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∠D
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all of these

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Multiple Choice

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Which is the process of reflection of light

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When light falls on a highly polished surface like a mirror most of the light is sent back in to the same medium.

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When light travels at an angle into a substance with a different refractive index (optical density).

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Multiple Choice

Question image

When light reflects on a rough surface ,the reflected rays will travel in the same direction.

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True

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False

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Multiple Choice

When light hits an area and it bounces back its called

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echo

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reflection

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refraction

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absorbing

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Multiple Choice

Light travels through air,water,glass and many other materials.What path does it travel to get from one place to another?

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sideways

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straight

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back and forth

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up and down

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Multiple Choice

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What is the best explanation for Mickey seeing himself in the mirror?

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refraction

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reflection

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absorbed

4

flipped

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Multiple Choice

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The law of Reflection:

The angle of incidence is________the angle of reflection

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bigger than

2

smaller than

3

the same as

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Multiple Choice

Question image

The diagram shows

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refraction of light.

2

absorption of light.

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reflection of light.

4

scatter of light.

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Multiple Choice

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Which is the reflected ray?

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A

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B

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C

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D

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Multiple Choice

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Which diagram represents specular reflection?

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A

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B

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Multiple Choice

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In the diagram, which letter represents the angle of incidence?

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A

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B

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C

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D

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Multiple Choice

According to the laws of reflection,

if i = angle of incidence and r = angle of reflection,

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i = r

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i > r

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r > i

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i is not equal to r

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Multiple Choice

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The following diagram shows the ray diagram when a torch light is torched towards a mirror. Which of the following is the correct reflected ray?

1
2
3

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Multiple Choice

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The following diagram shows a driver who could see the image of a vehicle behind him without turning his back.

Why?

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Light travels in a straight line

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Light is refracted

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Light is reflected

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Light travels in two different mediums

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Multiple Select

Tick the correct of TWO devices which use the principle of light reflection in our daily lives.

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8.3 REFLECTION OF LIGHT

by KASMAWATI Moe

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