Gyani − Profile

ƒinversly proportional to wavelegth 

ratio of frequency is 3:1

ratio of wavelength is 1:3

f=25 cm=0.25m

power=1/focal length

=1/0.25

=4D

when a body is submerged in a liquid it experience apparent loss in weight the apparent loss in weight is equal to equal weight of liquid submerged by the immersed part of the body 

travel with speed of 3x10⁸

produce fluorscence 

it is a phenomenon by which we can detct a sunken ship or a submarine using reflection of ultra sonic vibrations

Angle of incidence in denser medium corresponds to angle of refraction in rarer medium is 90

1. 1:1

2.1:2