Can two different bulbs, similar in all respect act as coherent sources ? Give reasons for your answer.

Can a triangle have two obtuse angles ? Give reason for your answer.

Can a triangle have two obtuse angles ? Give reason for your answer.

Can RNA be amplified by PCR? Give reason for your answer.

Can two different points in the complex plane represent the same complex number ? Give reasons for your answer.

Can two different points in the complex plane represent the same complex number? Give reasons for you answer

Can two different points in the complex plane represent the same complex number? (Give reasons for your answer).

Can dispersive power of a prism be negative? Give reason for your answer.

Two independent light sources cannot act as coherent sources. Why?