Rahul purchases only 2 goods: ice cream and chocolates. If own price elasticity of demand for chocolates is 1, what is the cross price elasticity of demand for ice creams? show your calculation/reasoning

Luminous objects such as flashlights emit light that we can see. how do we see an object that isn’t luminous? a. the object emits light that reaches our eyes. b. light reflects off the object and reaches our eyes. c. light passes through the object uninterrupted. d. light is fully absorbed by the object. e. we can’t see an object that isn’t luminous.