| List I | List II |
| a) Luminous Object | 1.) emit light of their own |
| b) Transparent Object | 2.) we can see, but not clearly |
| c) Translucent Object | 3.) allowing light to pass through it |
The question asks us to match terms related to light and objects with their correct definitions. We need to understand the basic properties of luminous, transparent, and translucent objects to make the correct matches.
A) a-1, b-3, c-2. This option correctly matches Luminous Object with emitting its own light, Transparent Object with allowing light to pass through it, and Translucent Object with allowing us to see but not clearly.
The question asks about the advantages of Organic Light Emitting Diode (OLED) displays over Liquid Crystal Displays (LCDs). We need to evaluate each given statement regarding OLED capabilities.
C) 1, 2 and 3. All three statements accurately describe advantages of OLED displays over LCDs. OLEDs' inherent properties allow for flexibility, roll-up designs, and transparency, which are generally not achievable with conventional LCD technology.
The question asks to identify the type of object that does not allow light to pass through it. This relates to the classification of materials based on their interaction with light.
Correct Option: C) Opaque object does not allow light to pass through them.
The question asks what happens when an opaque object blocks the path of light. We need to understand the basic properties of light and how it interacts with different types of objects, specifically opaque ones.
Therefore, when an opaque object comes in the path of light, shadows are formed.
Correct Option: A) Shadows are formed when an opaque object blocks the path of light, preventing it from reaching the area behind the object.
The question asks about 'LiFi' and its characteristics. We need to evaluate two statements regarding LiFi's medium of data transmission and its speed compared to WiFi.
LiFi (Light Fidelity) is a wireless communication technology that uses visible light communication (VLC) to transmit data. It modulates the intensity of light from LED lamps to send data at very high speeds. Therefore, light is indeed the medium for data transmission.
LiFi is a wireless technology, as it transmits data through the air using light waves, similar to how WiFi uses radio waves. One of the key advantages of LiFi is its potential for significantly higher speeds compared to traditional WiFi. Because it uses the visible light spectrum, which is much larger than the radio spectrum, LiFi can achieve data transmission rates that are theoretically several times faster than WiFi.
C) Both 1 and 2 are correct. LiFi uses light for high-speed data transmission and is a wireless technology that offers speeds potentially much greater than WiFi.
The question asks to identify the correct statements regarding light and optics from the given options. We need to evaluate each statement individually based on fundamental principles of light, pinhole cameras, reflection, and properties of objects.
A) (i) and (ii) only. Statements (i) and (ii) are correct, while statement (iii) is incorrect.