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Bluetooth was initially designed to be wire free interface among devices, its range was limited to about 10feet and power ratings were small to allow its use in mobile devices. The number of devices that could be paired were also limited. 

Wi-fi was an Intel technology for wireless computer networking that could operate over a much longer range of upto 10 meters and much higher speeds compared to bluetooth. 

Answer

1.Bluetooth - It is a wireless technology for exchanging data over short distances using short wavelentgh UHF radio waves from fixed networks.Its operates at frequency between 2480MHz and 2483.5MHz..Its physical range is less than 10m to 100m.

2.WiFi - It stands for wireless fidelity. wifi is the marketing name fro IEEE standard 802.11.It is a standard for both level 1 (physical) and level 2 (data link) of a wireless data transmission protocol.It is primarily a local area networking(LAN) technology designed to provide in building broadband coverage.Its frequency is 20MHz.

 

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Bluetooth:Bluetooth operates at frequencies between 2402 and 2480 MHz, or 2400 and 2483.5 MHz including guard bands 2 MHz wide at the bottom end and 3.5 MHz wide at the top.[16] This is in the globally unlicensed (but not unregulated) industrial, scientific and medical (ISM) 2.4 GHz short-range radio frequency band. Bluetooth uses a radio technology called frequency-hopping spread spectrum. Bluetooth divides transmitted data into packets, and transmits each packet on one of 79 designated Bluetooth channels. Wi-Fi:Wi-Fi or WiFi (/ˈwaɪfaɪ/) is a technology for wireless local area networking with devices based on the IEEE 802.11 standards. Wi-Fi is a trademark of the Wi-Fi Alliance, which restricts the use of the term Wi-Fi Certified to products that successfully complete interoperability certification testing.

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