Barometer is the instrument that is used to measure air pressure. The correct option among all the options given in the question is option "c". A barometer is a scientific instrument that is used in meteorology for measuring the pressure in the atmosphere. This instrument is made of a long glass tube that is open in one end and closed in the other. It contains mercury and is placed invertedly in a bigger container containing mercury.
Answer:
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Im not sure if this is right if not please let me know. D and B.
A diverging lens has a focal length of magnitude 21.8 cm and the images are located behind the lens.
(a) u = -10.9 cm
1/v= 1/10.9 - 1/21.9
v= 21.8cm
Behind the lens.
(b) 1. Virtual
2. Virtual
3. Real
(c) m = v/u
1. Erect/ Upright
2. Upright
3. Inverted
(d) m = v/u
1. m = -43.6/-43.6 = 1. Magnification = 1.
2. infinity.
3. m = 21.8 / -10.9 = -2. Magnification = -2.
Therefore, these are the answers for above given question.
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