I.Chemical II.Sound III.Electricity Which of the above forms of energy can directly be converted to light energy?

Analyze the question: We need to find which of the listed energy forms can be converted directly into light energy.

Concept: Energy conversion is "direct" when no intermediate form is needed.

Going through each form:

• I. Chemical → light: Yes, this is direct. Examples include a burning candle or burning kerosene (combustion), fireflies (bioluminescence), and glow sticks (chemiluminescence).
• II. Sound → light: Not directly. A microphone turns sound into electrical energy first, and that electricity then powers a light. There is a rare lab effect called sonoluminescence, but it is not a standard conversion at JAMB level. So sound is not treated as directly convertible.
• III. Electricity → light: Yes, this is direct. Examples include an electric bulb, a fluorescent tube, and LEDs.

Result: Only I (chemical) and III (electricity) convert directly to light.

Answer: D. I and III only

Tip: For "direct conversion" questions, ask whether another energy form must come in between. Sound always needs a transducer (such as a microphone) to become electricity first, so it is usually ruled out. Remember that light sources come from burning (chemical) or from electric current.