When Sunita, a class XII student, came to know that her parents are planning to rent out the top floor of their house to a mobile company she protested. She tried hard to convince her parents that this move would be a health hazard.
(i) Ultimately her parents agreed.
(1) In what way can the setting up to transmission tower by a mobile company in a residential colony prove to be injurious to health?
(2) By objective to this move the parents, what value did Sunita display?
(3) Estimate the range of e.m. waves which can be transmitted by an antenna of height 20m. (Given radius of the earth = 6400 km).

Explanation

### Step-by-Step Solution:

**(1) Health Hazards of Setting Up a Transmission Tower:**
The setting up of a transmission tower by a mobile company in a residential colony can be injurious to health due to the following reasons:
- **Electromagnetic Radiation:** The tower emits electromagnetic waves, particularly microwaves, which can be harmful to human health. Prolonged exposure to these waves has been linked to various health issues, including:
- Increased risk of tumors and cancers.
- Potential neurological effects, such as headaches and sleep disturbances.
- **High Power Operation:** The transmitting antennas operate at very high power levels, which increases the risk of exposure to harmful radiation. This can lead to severe health hazards, including burns or other injuries.
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