Presentation on any one topic (properties of light, properties of Acids and bases)
Answers
Answer:
Acids are chemical substances which are characterized by a sour taste in an aqueous medium. They have the tendency to turn blue litmus red. On the other hand, bases are chemical substances which are characterized by a bitter taste and are slippery to the touch. Some bases are soluble in water while others are not.
Water soluble bases are known as alkalis. They have the tendency to turn red litmus blue. Acids and bases react with a wide range of chemical compounds to form salts. Some chemical reactions of acids and bases are:
Answer:
Reflection Normal-line perpendicular to the reflecting surface. Incident ray/incoming ray-the ray that hits the barrier/surface. angle of incidence-angle formed by the incident ray with the normal.
Light Wave Properties of Light Reflection Refraction Diffraction interference
. Reflection reflection when a wave strikes an object and bounces off
Reflection incident ray reflected ray Normal Surface