Question

answer this que plz​

Answer 1

option d is incorrect..............

(a) ct = speed × time = distance = in metres

lambda is in metres too.

(b) x is the distance in metres and lambda is also in meteres

(c)2π is constant so leave it.

(c)/lambda = (m/s)/m. = 1/s

x/(lambda t) = m/(ms) = 1/s

hope this helps you