In physics, interference is a phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude. The color bands in thin films are a result of wavelength dependent interference caused by the close spacing of the surfaces of the film.
A sentence has been given in Direct/Indirect Speech. Out of the four given alternatives, select the one which best expresses the same sentence in Indirect/Direct Speech.
Gopal said to his friends, “Are you angry?”
A) Were they angry, asked Gopal.
B) Gopal asked why they are angry.
C) Gopal asked them whether they are angry.
D) Gopal asked his friends whether they were angry.
A) Were they angry, asked Gopal.
B) Gopal asked why they are angry.
C) Gopal asked them whether they are angry.
D) Gopal asked his friends whether they were angry.
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