The laws of reflection are true for
A) the plane mirror only
B) the concave mirror only
C) the convex mirror only
D) all reflecting surfaces
Correct Answer:
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Q12: SONAR is based on the principle of
A)echo
B)resonance
C)reverberation
D)any
Q13: Which of the following frequencies of sound
Q14: The mirror used in automobiles to see
Q15: The mirror used in search lights is
A)concave
B)convex
C)plane
D)none
Q16: Shaving mirrors are
A)convex mirrors
B)concave mirrors
C)plane mirrors
D)none of
Q18: When the object is at focus of
Q19: Which of the following is a non-luminous
Q20: A body which allows most of the
Q21: During the 19th century, light was considered
Q22: Who first proposed that light was wave-like
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