Which is a tool used by scientists to determine the composition of objects? a hologram a spectrometer a wave front a prism

Explanation :

(1) Hologram : It is a 3-d image which is created with photographic projections.

(2) Spectrometer: It is an instrument which is used to separate and measure the spectral components of objects. It is used to separate particles, atoms and molecules by their mass, momentum or energy.  

There are many types of spectrometers i.e. Optical spectrometer, Mass spectrometer, Time-of-flight spectrometer and Magnetic spectrometer.

Hence, Spectrometer is used by scientists to determine the composition of objects.

spectrometer

Explanation: idk trust me ‍♀️

when cloud cover increases then the suns ray's which provides the earth with light and warmth gets covered due to the due to the suns ray's being blocked, the temperature in that region

therefore to conclude i would like to say that,

=more the cloud cover, the lesser the

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c. magnitude and direction