The wave frequency is 2 Hz.
What is wave frequency ?
The number of waves that pass through a fixed point in a given amount of time is referred to as the wave frequency. The hertz is the SI unit for wave frequency (Hz).
where,
Given,
The waves frequency is 2 Hz.
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Answer:
The appropriate solution is:
(a)
(b)
(c)
Explanation:
According to the question, the value is:
Power of bulb,
= 60 W
Distance,
= 1.0 mm
Now,
(a)
⇒
On applying cross-multiplication, we get
⇒
⇒
⇒
(b)
As we know,
⇒
By putting the values, we get
⇒
(c)
⇒
⇒
⇒
Answer:
(a) 40.6 degree
Explanation:
When refraction takes place from slab to water, the critical angle is 60 degree.
Use Snell's law
refractive index of water with respect to slab
μs = 1.536
Now for slab air interface, the critical angle is C.
1 / 1.536 = Sin C
C = 40.6 degree