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In the context of space technology, what is ‘Bhuvan’, recently in the news?
(a)A mini satellite launched by ISRO for promoting the distance education in India
(b)The name given to the next Moon impact probe, for Chandrayan-II
(c)A geoportal of ISRO with 3-D imaging capabilities of India
(d)A space telescope developed by India

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Important Questions on Science and Technology
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Consider the following
1. Bluetooth device
2. Cordless phone
3. Microwave oven
4. Wi-Fi device
Which of the above can operate between 2.4 and 2.5GHz range of radio frequency band?

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Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when:
1. the orbit is geosynchronous.
2. the orbit is circular.
3. the orbit lies in the place of the Earth’s equator.
4. the orbit is at an altitude of 22236 km.
Select the correct answer using the codes given below:

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1. DVD supports Standard Definition video while BD supports High Definition video.
2. Compared to a DVD, the BD format has several times more storage capacity.
3. Thickness of BD is mm while that of DVD is mm.
Which of the statement(s) given above is/are correct?
