Question

If Any one here have science 9 th std digest then please send me the objective of 18 lesson.

100 POINTS

Please I need it....ANSWER ​

Answer 1

$\begin{lgathered}\huge{\underline{\color{green}{\textsf{\textbf{Chapter \ 18 \ : \ Observing \ Space}}}}} \\\end{lgathered}$

(1) ANSWER:

a.  The wavelength of visible light is between 400 nm and 800 nm.

b.  GMRT is used for radio waves.

c.  A certain X-ray telescope is named after scientist Subramanian chandrashekhar.

d.  The first scientist to use a telescope for space observation was Galileo Galilei.

e.  The biggest optical telescope in India is situated at Aryabhatt Research Institute of Experimental Sciences, Nanital.

(2) ANSWER:

(i)  X -rays - (d) Chandra

(ii) Optical telescope - (c) Hubble telescope

(iii) Indian radio - (a) GMRT

(iv) Launching artificial satellites - (b) ISRO

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Hope it helps you mate! :)

Answer 2

Answer in the above text