Environmental Science - Study Mode

[#831] Electromagnetic radiation with wavelengths between 0.4 and 0.7 micrometers is called:
Correct Answer

(B) Visible light

Explanation

Solution: The higher the frequency, the shorter the wavelength. The only part of the spectrum that we can see is called visible. Wavelengths between 0.4 and 0.7 micrometers are visible. It appears white but contains different colors.

[#832] Which of the following has a wavelength shorter than that of violet light?
Correct Answer

Green light

Explanation

Solution: Visible light is simply electromagnetic radiation in a range of wavelengths that our eyes are sensitive to. Visible wavelengths range from 0.0007 milimeters for red light, through orange, yellow, green, and blue, to 0.0004 milimeters for violet light. Ultraviolet is shorter wavelengths than violet.

[#833] The relative humidity is often near 100 percent in the Polar Regions.
Correct Answer

(A) True

[#834] Stratus clouds are typically puffy and form by convection.
Correct Answer

(B) False

[#835] The controversial dam across the river Narmada?
Correct Answer

(A) Sardar Sarovar

Explanation

Solution: The Sardar Sarovar Dam is a gravity dam on the Narmada river near Navagam, Gujarat in India. Four Indian states, Gujarat, Madhya Pradesh, Maharastra and Rajasthan, receive water and electricity supplied from the dam. The foundation stone of the project was laid out by Prime Minister Jawaharlal Nehru on 5 April 1961.