this path difference will be lambda by 2 from the next one it will be between these two successive 2; it will be lambda by 2 all the time lambda by 2 from the beginning, so lambda by 2 then 2 lambda means lambda 3 lambda by 2, 4 lambda by 2 etcetera.
शुरुआत से ही हर समय यह लैम्ब्डा बाय टू होगा तब लैम्डा बटा दो फिर दो लैम्डा मतलब 3 लैम्डा बटा दो, 4 लैम्डा बटा दो इत्यादि।