Consider the following statements regarding 'Diffused Reflection': 1. It occurs on smooth surfaces like mirrors. 2. The reflected rays are not parallel to each other. 3. It prevents us from seeing non-luminous objects. Which of the statements given above are correct?

The correct option is (b). Explanation Reflection is classified into two types based on the nature of the reflecting surface: Regular (Specular) Reflection and Diffused (Irregular) Reflection. - Statement 1 is Incorrect: Diffused reflection takes place on rough or irregular surfaces such as paper, wood, or walls. Reflection that occurs on smooth, highly polished surfaces like mirrors is known as Regular Reflection. - Statement 2 is Correct: When a beam of parallel light rays strikes a rough surface, the irregularities on the surface cause the rays to reflect in various directions. While the laws of reflection are valid at each specific point of incidence, the overall result is that the reflected rays are not parallel to one another. - Statement 3 is Incorrect: Diffused reflection is essential for seeing non-luminous objects. Because the light is scattered in all directions, the object becomes visible to observers located at different positions. If reflection were only regular (like a mirror), the object would only be visible from a specific angle where the reflected rays reach the eye. Key Takeaway: Diffused reflection occurs on rough surfaces and scatters light in multiple directions, enabling the visibility of non-luminous objects from various angles.

Consider the following statements regarding 'Diffused… - NCERT Class 8 Science MCQ

NCERT Class 8 Science — Chapter 4: Light

mcqmedium

Consider the following statements regarding 'Diffused Reflection':

It occurs on smooth surfaces like mirrors.
The reflected rays are not parallel to each other.
It prevents us from seeing non-luminous objects.

Which of the statements given above are correct?

NCERT textbook question

From NCERT Science - class 8 · Page 168

Options

A1 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

The correct option is (b).

Explanation

Reflection is classified into two types based on the nature of the reflecting surface: Regular (Specular) Reflection and Diffused (Irregular) Reflection.

Statement 1 is Incorrect: Diffused reflection takes place on rough or irregular surfaces such as paper, wood, or walls. Reflection that occurs on smooth, highly polished surfaces like mirrors is known as Regular Reflection.
Statement 2 is Correct: When a beam of parallel light rays strikes a rough surface, the irregularities on the surface cause the rays to reflect in various directions. While the laws of reflection are valid at each specific point of incidence, the overall result is that the reflected rays are not parallel to one another.
Statement 3 is Incorrect: Diffused reflection is essential for seeing non-luminous objects. Because the light is scattered in all directions, the object becomes visible to observers located at different positions. If reflection were only regular (like a mirror), the object would only be visible from a specific angle where the reflected rays reach the eye.

Key Takeaway: Diffused reflection occurs on rough surfaces and scatters light in multiple directions, enabling the visibility of non-luminous objects from various angles.

Your note

More from Chapter 4: Light

With reference to the Periscope, consider the following statements: 1. It works on the principle of multiple reflections. 2. It uses two plane mirrors arranged at right angles to each other. 3. It allows viewing of objects that are not directly in the line of sight. Which of the statements given above are correct?

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With reference to image formation by a plane mirror, consider the following statements: 1. The image formed cannot be obtained on a screen. 2. The image appears at a greater distance behind the mirror than the object is in front. 3. The image undergoes lateral inversion. Which of the statements given above are correct?

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Consider the following statements about the image formed by a plane mirror: 1. It is inverted vertically. 2. It is of the same size as the object. 3. It appears to be at the same distance behind the mirror as the object is in front. Which of the statements given above is/are correct?

easy

In the context of the reflection of light, what does the term 'angle of incidence' refer to?

easy

With reference to the eye's ability to see, consider the following statements: 1. A normal eye can clearly see distant objects as well as objects nearby. 2. The minimum distance for distinct vision is constant at 50 cm for all ages. 3. In old age, eyesight may become foggy due to the eye lens becoming cloudy. Which of the statements given above is/are correct?

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