alleryStart learning →Which colours of visible light have the shortest wavelengths and therefore the highest energy?
ARed and orange light
BYellow and green light
CViolet and blue light
DOrange and yellow light
Answer & Solution
Correct answer: C. Violet and blue light
1. White light disperses into a rainbow of colours through a prism or a drop of water.
2. Violet and blue have the shorter wavelengths and therefore higher energy.
3. Towards red the wavelengths are longer and carry lower energy.
4. Red therefore carries the least energy of the visible colours, which is the opposite end of the same rule.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 8 "Photosynthesis", section 8.2 The Light-Dependent Reactions of Photosynthesis_
Keep practising Photosynthesis
Browse all Photosynthesis questions for KCSE, or explore more Biology topics.
Related questions
Knock out the false leaf claimsMatch each leaf part to its jobWhy does a plant lose water during active photosynthesis?How does modern oxygenic photosynthesis differ from the older bacterial type?How many turns of the cycle are needed before a three-carbon molecule can leave to join a How many extra molecules of adenosine triphosphate are used in the regeneration reactions?Of the six molecules made after three turns of the cycle, how many leave and how many stayHow many molecules of adenosine triphosphate and NADPH are used in the reduction stage?