An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is HomeLight MCQsAn object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror isQ. An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror isA. – 30 cmB. 30 cmC. – 15 cmD. +15 cmAnswer: – 15 cm
When angle of incidence in denser medium is greater than critical angle, will total internal reflection take place or not?
