Q9: Select the option that can be used as a oneword substitute for the given group…

Question 9

Select the option that can be used as a oneword substitute for the given group of words.

The branch of physics concerned with the

properties of sound

(a) Optics (b) Photonics

SSC CHSL (Tier-I) –05/08/2021 (Shift-I)

Ans. (d) : Above group of word's The branch of physics

of sound means - Acoustics.

Hence option (d) 'Acoustics' would be oppropirate other

optionsMachanics- A person whose job is repairing machines,

especially the engines of vehicles.

Photonics - It is the physical science of light waves.

Optics - the scientific study of sight and light.

सरकारी नौकरी का सपना, अब होगा पूरा!