Gr 8 Natural Sciences Ch 3.4: Reflection of light

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What happens to the reflected rays when light reflects off a smooth surface?

They are absorbed by the surface

They are parallel (correct)

They scatter in different directions

They change color

What is reflection of light?

The bouncing of light off a surface (correct)

The bending of light around a corner

The property of light that allows it to pass through a surface

The absorption of light by a surface

What is an example of a rough surface?

A mirror

A laser beam

A prism

Rippled water (correct)

What is the purpose of measuring the angles of incidence and reflection in the practical investigation?

To verify that they are equal Signup and view all the answers

What is the incident ray?

The ray of light that strikes a surface Signup and view all the answers

What is the type of reflection that occurs on a smooth surface?

Specular reflection Signup and view all the answers

What is the purpose of the normal line?

To understand and measure reflection Signup and view all the answers

What is the result of light reflecting off a rough surface?

A diffuse and unclear reflection Signup and view all the answers

What is the relationship between the angle of incidence and the angle of reflection?

The angle of incidence is equal to the angle of reflection Signup and view all the answers

What happens to light when it reflects off a surface?

It changes direction Signup and view all the answers

What is the reflected ray?

The ray of light that bounces off a surface Signup and view all the answers

What is the term for being at an angle of 90 degrees to a given line or surface?

Perpendicular Signup and view all the answers

What is an example of a reflective surface?

A still lake Signup and view all the answers

What is the primary difference between a smooth surface and a rough surface in terms of reflection?

Uniformity of reflected rays Signup and view all the answers

What can be observed when shining a flashlight at different angles on a mirror?

The angle of incidence is always equal to the angle of reflection Signup and view all the answers

What is the purpose of the practical investigation with a flashlight and a mirror?

To verify the law of reflection Signup and view all the answers

What can be inferred from the image shown in the Reflection Comparison diagram?

The rough surface scatters light in different directions Signup and view all the answers

What is the characteristic of the reflection that occurs on a smooth surface like a mirror?

The reflected rays are parallel and focused Signup and view all the answers

What is the main purpose of the normal line in understanding reflection?

To determine the point of incidence on the surface Signup and view all the answers

What is the relationship between the angle of incidence and the angle of reflection according to the law of reflection?

The angle of incidence is equal to the angle of reflection Signup and view all the answers

What is the term used to describe the ray of light that strikes a surface?

Incident ray Signup and view all the answers

What is the result of the incident ray hitting a smooth surface?

The light is reflected off the surface Signup and view all the answers

What is the role of the normal line in measuring angles of incidence and reflection?

It provides a reference point for measuring both angles of incidence and reflection Signup and view all the answers

What is an example of a situation where reflection of light can create a mirror image?

A still lake Signup and view all the answers

What is the term used to describe being at a 90-degree angle to a given line or surface?

Perpendicular Signup and view all the answers

What happens to the direction of light when it reflects off a surface?

It changes direction Signup and view all the answers

What is the primary reason for the difference in reflection between smooth and rough surfaces?

The uniformity of the surface structure Signup and view all the answers

What is the purpose of measuring the angles of incidence and reflection in the practical investigation?

To verify that the angles of incidence and reflection are equal Signup and view all the answers

What is the characteristic of the image formed by specular reflection from a smooth surface?

Clear and focused Signup and view all the answers

What is the role of the flashlight in the practical investigation?

To produce a parallel beam of light Signup and view all the answers

What can be inferred about the surface of still water from the Reflection Comparison diagram?

It can produce a clear and focused image Signup and view all the answers

What is the primary reason why a still lake can act as a mirror?

The lake's surface is smooth. Signup and view all the answers

What is the role of the normal line in measuring angles of incidence and reflection?

To provide a reference point for measuring angles. Signup and view all the answers

What is the relationship between the angle of incidence and the angle of reflection according to the law of reflection?

The angle of incidence is equal to the angle of reflection. Signup and view all the answers

What happens to the direction of light when it reflects off a surface?

It changes direction. Signup and view all the answers

What is the purpose of understanding reflection?

To study the properties of light. Signup and view all the answers

What is the characteristic of the normal line?

It is perpendicular to the surface. Signup and view all the answers

What is the result of the incident ray hitting a smooth surface?

The light is reflected. Signup and view all the answers

What is an example of a situation where reflection can create a mirror image?

A still lake. Signup and view all the answers

What is the main difference between specular reflection and diffuse reflection?

The clarity of the reflected image Signup and view all the answers

In the practical investigation, what is the purpose of shining the flashlight at different angles on the mirror?

To verify the law of reflection Signup and view all the answers

What is the characteristic of the surface of still water that allows it to act as a mirror?

It is smooth and uniform Signup and view all the answers

What can be observed when light reflects off a rough surface?

A diffuse and unclear image Signup and view all the answers

What is the purpose of measuring the angles of incidence and reflection in the practical investigation?

To verify the law of reflection Signup and view all the answers

Gr 8 Natural Sciences Ch 3.4: Reflection of light

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Questions and Answers

What happens to the reflected rays when light reflects off a smooth surface?

What is reflection of light?

What is an example of a rough surface?

What is the purpose of measuring the angles of incidence and reflection in the practical investigation?

What is the incident ray?

What is the type of reflection that occurs on a smooth surface?

What is the purpose of the normal line?

What is the result of light reflecting off a rough surface?

What is the relationship between the angle of incidence and the angle of reflection?

What happens to light when it reflects off a surface?

What is the reflected ray?

What is the term for being at an angle of 90 degrees to a given line or surface?

What is an example of a reflective surface?

What is the primary difference between a smooth surface and a rough surface in terms of reflection?

What can be observed when shining a flashlight at different angles on a mirror?

What is the purpose of the practical investigation with a flashlight and a mirror?

What can be inferred from the image shown in the Reflection Comparison diagram?

What is the characteristic of the reflection that occurs on a smooth surface like a mirror?

What is the main purpose of the normal line in understanding reflection?

What is the relationship between the angle of incidence and the angle of reflection according to the law of reflection?

What is the term used to describe the ray of light that strikes a surface?

What is the result of the incident ray hitting a smooth surface?

What is the role of the normal line in measuring angles of incidence and reflection?

What is an example of a situation where reflection of light can create a mirror image?

What is the term used to describe being at a 90-degree angle to a given line or surface?

What happens to the direction of light when it reflects off a surface?

What is the primary reason for the difference in reflection between smooth and rough surfaces?

What is the purpose of measuring the angles of incidence and reflection in the practical investigation?

What is the characteristic of the image formed by specular reflection from a smooth surface?

What is the role of the flashlight in the practical investigation?

What can be inferred about the surface of still water from the Reflection Comparison diagram?

What is the primary reason why a still lake can act as a mirror?

What is the role of the normal line in measuring angles of incidence and reflection?

What is the relationship between the angle of incidence and the angle of reflection according to the law of reflection?

What happens to the direction of light when it reflects off a surface?

What is the purpose of understanding reflection?

What is the characteristic of the normal line?

What is the result of the incident ray hitting a smooth surface?

What is an example of a situation where reflection can create a mirror image?

What is the main difference between specular reflection and diffuse reflection?

In the practical investigation, what is the purpose of shining the flashlight at different angles on the mirror?

What is the characteristic of the surface of still water that allows it to act as a mirror?

What can be observed when light reflects off a rough surface?

What is the purpose of measuring the angles of incidence and reflection in the practical investigation?

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