Light - Study Mode
[#366] The mirror used by a dentist to examine the teeth of patients is
Correct Answer
(A) concave
[#367] If the angle of incidence in denser medium is equal to critical angle, the angle of refractive will be
Correct Answer
(C) 90°
[#368] Which one of the following statement is not correct?
Correct Answer
(D) Convex mirror with a small aperture is used by doctors to examine, ear, nose or throat of apatient
[#369] Lens is made up of
Correct Answer
(B) flint glass
[#370] In fibre optics communication, the signal travels in the form of
Correct Answer
(A) Light wave