The current loop lies flat on a horizontal surface. Facing the loop from the top, the current moves in a clockwise direction. Wh
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Answer:
Speed of the wave in the string will be 3.2 m/sec
Explanation:
We have given frequency in the string fixed at both ends is 80 Hz
Distance between adjacent antipodes is 20 cm
We know that distance between two adjacent anti nodes is equal to half of the wavelength
So
We have to find the speed of the wave in the string
Speed is equal to
So speed of the wave in the string will be 3.2 m/sec
Answer:
a
The focal length of the lens in water is
b
The focal length of the mirror in water is
Explanation:
From the question we are told that
The index of refraction of the lens material =
The index of refraction of the medium surrounding the lens =
The lens maker's formula is mathematically represented as
Where is the focal length
is the index of refraction
are the radius of curvature of sphere 1 and 2 of the lens
From the question When the lens in air we have
When immersed in liquid the formula becomes
The ratio of the focal length of the the two medium is mathematically evaluated as
From the question
= 79.0 cm
and the refractive index of water(material surrounding the lens) has a constant value of
b
The focal length of a mirror is dependent on the concept of reflection which is not affected by medium around it.