Question

Give reasons: (i) Solar concentrates increase the efficiency of solar energy devices. (ii) hydrogen as a source of energy,is associated with many technical constraints​

Answer 1

Explanation:

• 1.Solar concentrates increase the efficiency of solar energy devices. ANS. Solar cell performance is directly linked to the efficiency of converting sunlight into electricity. ... Conventional solar cells only absorb a narrow range of wavelengths very efficiently..
• 2..It’s a fact that hydrogen energy is a renewable resource because it’s abundantly available and its impacts hugely neglected. However, hydrogen companies will, in real sense, need other forms of non-renewable energy such as fossil (coal, natural gas, and oil) to separate it from oxygen. We may be able to minimize over-reliance on fossils fuels when we embrace hydrogen energy, but it will be daunting to get rid of it from the system.