Which three forms of light are invisible light?

a. blue light

b. infrared rays

c. radio waves

d. red light

e. x-rays

(B,C,E). The infrared rays, radio waves and x-rays are forms of light are invisible light.

Explanation:

We know that,

The electromagnetic spectrum shows the wave length of the electromagnetic radiation of visible light.

Human eyes can detect the visible light. The wave length of the visible light is 380 nm to 750 nm. Violet light has low frequency and red light has the high frequency.

Human eyes can't detect the invisible light. Radio waves, X-rays and infrared rays are comes in the invisible light. these wave length is shorter compare to visible light.

The wave length of the Radio waves, X-rays and infrared rays defined as:

Radio waves = 1 mm to 10000 km

X-rays = 0.01 m to 10 nm

Infrared rays = 700 nm to 1 mm

Hence, The infrared rays, radio waves and x-rays are forms of light are invisible light.

pe = weightxheight = 2000x1000=2,000,000joules

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