Consider the following statements about 'Regular Reflection': 1. It takes place from a smooth surface. 2. Images cannot be formed by regular reflection. 3. It occurs when parallel rays are reflected in different directions. Which of the statements given above is/are correct?

The correct option is (a). Explanation Reflection of light is classified into two primary types based on the texture of the reflecting surface: regular (specular) reflection and irregular (diffuse) reflection. The behavior of parallel rays of light differs significantly between these two types. Statement-wise Analysis: - Statement 1 is Correct: Regular reflection takes place from a smooth, highly polished surface, such as a plane mirror or a sheet of still water. On such surfaces, the angle of incidence is identical for all parallel rays in a beam. - Statement 2 is Incorrect: Regular reflection is the mechanism responsible for the formation of clear images. For example, the image seen in a plane mirror is formed due to regular reflection. Irregular (diffuse) reflection allows objects to be seen from various angles but does not form a distinct image. - Statement 3 is Incorrect: In regular reflection, a beam of parallel incident rays remains parallel after reflection. If parallel rays are reflected in different directions (scattered), the phenomenon is called irregular or diffuse reflection, which occurs on rough surfaces. Key Takeaway: Regular reflection occurs on smooth surfaces where parallel incident rays remain parallel after reflection, enabling image formation. Diffuse reflection occurs on rough surfaces, scattering light in multiple directions.

Consider the following statements about 'Regular Reflection':… - NCERT Class 8 Science MCQ

NCERT Class 8 Science — Chapter 4: Light

mcqmedium

Consider the following statements about 'Regular Reflection':

It takes place from a smooth surface.
Images cannot be formed by regular reflection.
It occurs when parallel rays are reflected in different directions.

Which of the statements given above is/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 (a).

Explanation

Reflection of light is classified into two primary types based on the texture of the reflecting surface: regular (specular) reflection and irregular (diffuse) reflection. The behavior of parallel rays of light differs significantly between these two types.

Statement-wise Analysis:

Statement 1 is Correct: Regular reflection takes place from a smooth, highly polished surface, such as a plane mirror or a sheet of still water. On such surfaces, the angle of incidence is identical for all parallel rays in a beam.
Statement 2 is Incorrect: Regular reflection is the mechanism responsible for the formation of clear images. For example, the image seen in a plane mirror is formed due to regular reflection. Irregular (diffuse) reflection allows objects to be seen from various angles but does not form a distinct image.
Statement 3 is Incorrect: In regular reflection, a beam of parallel incident rays remains parallel after reflection. If parallel rays are reflected in different directions (scattered), the phenomenon is called irregular or diffuse reflection, which occurs on rough surfaces.

Key Takeaway: Regular reflection occurs on smooth surfaces where parallel incident rays remain parallel after reflection, enabling image formation. Diffuse reflection occurs on rough surfaces, scattering light in multiple directions.

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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