ion : The phenomenon of change in the direction of light when it passes from one transparent medium to another is called refraction.Laws of refraction state that: The incident ray, REFLECTED ray and the normal, to the interface of any two given mediums; all lie in the same plane. The ratio of the sine of the angle of incidence and sine of the angle of refraction is constant.+91 95525 02588Read the passage given below.The word depressed in common use means sad, frustrated, fedup, bored up and pessimistic. The mood of a depressed personis MUCH lower at his or her best moments than the mood of thenormal PERSON at his or her worst. Depression is a state of mindIt is specifically a mental disorder characterized by a lowering ofthe individual's vitality, his mood, desires, hopes, aspirations andof his self-esteem.2Old age is one of the stages of human development where a persoaattains wisdom, maturity, social and economic stability with socisrecognition and emotional fulfilment. In ancient times, old peoplwere considered the guiding stars in INDIAN families, since theWithout interaction between these two systems, touching a hot surface could result in more DAMAGE than a simple blister. a. Digestive and circulatory systemb. Respiratory and circulatory systemc. Circulatory and integumentar systemd. Urinary, respiratory and integumentary systeme. nervous and integumentar system Thanks ka welcome