8.3 REFLECTION OF LIGHT

Presentation

•

Science

•

1st Grade

•

Hard

•

NGSS

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

Standards-aligned

KASMAWATI Moe

FREE Resource

35 Slides • 27 Questions

8.3 REFLECTION OF LIGHT

by KASMAWATI Moe

Light reflection

What is a light wave?

Tiny particles called photons moving very fast.

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!

Characteristic of a light wave

Travels in a straight line
Travels very, very fast

Types of light

Natural light: made from Earth
Artificial light: made by man

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

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

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!!!

Multiple Choice

The ray of light that strikes a reflecting surface is called ________.

incident ray

reflected ray

normal ray

none of the above

Multiple Choice

Light travels in ___________ lines

wavy

bent

straight

backwards

Multiple Choice

If the angle of incidence is 45 degree, what is the angle between the incident ray and reflecting surface

180

none of the above

Multiple Choice

The imaginary line perpendicular to a reflecting surface is called _____.

crooked line

parallel line

angular line

normal line

Multiple Choice

what is the angle between the incident ray and the normal called as

angle of incidence

angle of reflection

angle of convergent

angle of divergent

Multiple Choice

Law of reflection state that - The angle of incidence is .................. to the angle of reflection.

equal

double

half

Multiple Choice

What is reflection?

Reflection is the bouncing of light off the surface that it strikes on.

Reflection is the absorbing of light off the surface that it strikes on.

Reflection is the bending of light off the surface that it strikes on.

Reflection is the scattering of light off the surface that it strikes on.

Multiple Choice

The ray of light that strikes a reflecting surface is called ________.

incident ray

reflected ray

normal ray

none of the above

Multiple Choice

The angle produced as a source of light bounces off a reflecting surface is called ______.

angle of crookedness

angle of reflection

angle of incidence

angle of bounce

Multiple Choice

Why can you see most objects?

they emit light

light refracts through them

light reflects off them

They absorb light

Multiple Choice

What is the line MN called in the given diagram

incident ray

reflected ray

reflecting surface

normal

Multiple Choice

what is the angle between the reflected ray and the normal called as

angle of incidence

angle of reflection

angle of convergent

angle of divergent

Multiple Choice

What does incidence angle equal?

reflection angle

∠C

∠D

all of these

Multiple Choice

Which is the process of reflection of light

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

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

Multiple Choice

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

True

False

Multiple Choice

When light hits an area and it bounces back its called

echo

reflection

refraction

absorbing

Multiple Choice

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

sideways

straight

back and forth

up and down

Multiple Choice

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

refraction

reflection

absorbed

flipped

Multiple Choice

The law of Reflection:

The angle of incidence is________the angle of reflection

bigger than

smaller than

the same as

Multiple Choice

The diagram shows

refraction of light.

absorption of light.

reflection of light.

scatter of light.

Multiple Choice

Which is the reflected ray?

Multiple Choice

Which diagram represents specular reflection?

Multiple Choice

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

Multiple Choice

According to the laws of reflection,

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

i = r

i > r

r > i

i is not equal to r

Multiple Choice

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?

Multiple Choice

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

Why?

Light travels in a straight line

Light is refracted

Light is reflected

Light travels in two different mediums

Multiple Select

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

8.3 REFLECTION OF LIGHT

by KASMAWATI Moe

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