3 years ago

Two tuning forks, 254 Hz. and 260 Hz., are struck simultaneously. How many beats will be heard?

1 answer:

7 0

The longer you continue to listen, the more beats will be heard.

They'll occur at the rate of (260Hz - 254Hz) = 6 Hz .

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Light of wavelength λ travels through a medium with an index of refraction n1before striking a thin film with an index of refrac

ra1l [238]

Answer:

option C

Explanation:

The correct answer is option C

A light that transmits through n₂ travels t distance before reflection off the n₁ medium and again travels distance t before reaching the point from where it entered n₂ medium. Hence it travels 2 t distance more than the light that is reflected off n₂.

It( light entering n₂) also travels an additional distance equal to, half of the wavelength, when reflected off n₁ ( as n₁ is greater than n₂).

Wavelength in n₂ is = $\dfrac{\lambda}{n_2}$