Edward walked around two
edges of a square field
from A to B, Misha alked
diagonally from A to B.
Approximatel

1 thought on “Edward walked around two<br />edges of a square field<br />from A to B, Misha alked<br />diagonally from A to B.<br />Approximatel”

1. Answer:

   Answer:-

   Time period is 2.16 × 10⁻¹⁵ [Option.B]

   Explanation:-

   We have :-

   → Wavelength of red light = 6500 Å

   = 6.5 × 10⁻⁷ m

   → Velocity of light = 3 × 10⁸ m/s

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   Firstly let’s calculate the frequency of the red light. We know that :-

   ν = c/λ

   ⇒ ν = [3×10⁸]/[6.5×10⁻⁷]

   ⇒ ν = 0.46 × 10¹⁵

   ⇒ ν = 4.6 × 10¹⁴ Hz

   Now :-

   T = 1/ν

   ⇒ T = 1/[4.6 × 10¹⁴]

   ⇒ T = 0.216 × 10⁻¹⁴

   ⇒ T = 2.16 × 10⁻¹⁵ second

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