Understanding the Analogy: Mirror and Water

The question asks us to complete an analogy: Mirror : Reflection : : Water : ? This type of question tests our ability to identify the relationship between the first pair of words and then apply the same relationship to the second pair to find the missing word.

Relationship between Mirror and Reflection

A mirror is a surface that reflects light. When light rays strike a mirror, they bounce back, and this phenomenon is called reflection. So, the relationship here is that a mirror is something that causes or is associated with reflection of light.

Applying the Relationship to Water

Now we need to think about what physical phenomenon is primarily associated with water in a similar way that reflection is associated with a mirror, particularly when light interacts with it.

Let's look at the options provided:

• Refraction: When light passes from one medium to another, such as from air into water, it changes speed and direction. This bending of light is called refraction. This is a significant optical phenomenon that occurs with water.
• Evaporation: Evaporation is the process where water changes from a liquid to a gas (water vapor). This is a change of state and not related to how water interacts with light.
• Immersion: Immersion means putting something into water. It describes an action or state of being in water, not a specific physical phenomenon water itself causes on light.
• Conduction: Conduction is the transfer of heat or electricity through a material. It is not related to how water interacts with light.

Identifying the Correct Analogy

The analogy establishes a relationship based on how a substance (Mirror or Water) interacts with light (causing Reflection or another phenomenon). Just as a mirror causes reflection, water causes refraction when light passes through it or from another medium into it. Therefore, refraction is the optical phenomenon most closely analogous to reflection in this context, as it describes water's primary interaction with light causing a change in its path.

The correct answer is Refraction because it represents the key optical phenomenon associated with water, just as reflection is associated with a mirror.