Answer: option "A" is correct
Explanation: the closet to understand the intensity level will be from 80db (decibels) upwards. So option a which is 84db is the answer. Thank you.
Answer:
Explanation:
For constructive interference in thin films by reflected light , the condition is
Path difference = 2μd = odd multiple of λ / 2
Where μ is refractive index of water , d is thickness of water medium and λ
is wavelength of light
λ = 4μd or 4μd / 3 or 4μd / 5
= 4 x 1.33 x 400 nm = 2128 nm
or 2128 /3 = 709.33 nm
or 2128 /5 = 425.6 nm
For destructive interference ( dim reflection )
2μd = multiple of λ = λ or 2λ or 3λ
2 x 1.33 x 400 nm =1064
or 1064 x 2 = 2128 nm
or 1064 x 3 = 3192 nm.
Explanation:
total resistance=(2×2)/(2+2)= 1ohms
Explanation:
By using Einstein equation,
E = mc²
m = E/c²
As the sun's energy output remains constant, we are taking it as 3.839×10²⁶.
speed of light c = 299,729,458 m/s
by putting these values in above equation,
m = (3.839×10²⁶)/(299.729,458)²
m = 4.721×10⁹kg.
It is the mass that loss per second.
Now a year (including leap year) has 31,556,926 seconds. Thus the 10 billion years equal 1.348×10²⁷kg of total mass loss.
