# Electromagnetic Waves Quiz for Fun & Quiz Competition Practice 1

## Results

### #5. Which of the following electromagnetic radiation has the lowest energy?

Electromagnetic Waves Quiz Explanation is given below

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1. Poynting vector , S = Power/Surface Area

S= P/A

2. There is nothing like cylindrical polarization. Light can be linearly polarized or circularly polarized or elliptically polarized.

3. Direction of polarization of light wave is parallel to the direction of propagation of electric field. Polarized light wave vibrate only in one plane, not on more than one plane.

4. Ultraviolate radiation causes tans and burns on our skin. It is emitted by the sun and many hot objects in the space. It is a very dangerous kind of electromagnetic radiation that can even cause skin cancer due to heavy exposure. That’s why our earth has the ozone layer that filters the UV radiation coming from the cosmos.

5. Radiowaves possess the lowest energy as they’ve got the highest wavelength among all the rays in the electromagnetic spectrum. Higher the wavelength, the shorter be the frequency and hence, the shorter the energy.

Author: Som Abhishek

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## Electromagnetic Waves Quiz

1. The power radiated by the sun is 3.8 x 1026W and its radius is 7 x 105 km. The magnitude of the Poynting vector at the surface of the sun is _______.

a. 6.16 x 103 W/cm2()

b. 6.16 x 106 W/cm2

c. 6.16 x 108 W/cm2

d. 8.18 x 104 W/cm2

2. Which of the following is not a type of polarization of light waves?

a. Circular polarization

b. Cylindrical polarization()

c. Linear polarization

d. Elliptical polarization

3. Which of the following is a correct statement for polarization of a light wave?

a. Direction of polarization is parallel to the direction of the electric field()

b. Direction of polarization is parallel to the magnetic field

c. Polarized lights vibrate in more than one plane

d. All of the above

4. Which of the following electromagnetic radiation causes tans and burns on our body?

a. Microwave

b. X ray

c. Infrared

d. None of the above()

5. Which of the following electromagnetic radiation has the lowest energy?

a. Infrared