Electromagnetic Radiation Quiz

What is the primary mechanism by which electromagnetic radiation transfers energy?

• Convection

• Conduction

• Transverse magnetic and electric waves

• Reflection

In physical therapy, which form of electromagnetic energy is commonly used?

• X-rays

• Infrared radiation

• Gamma rays

• Visible light

Which law states that the intensity of radiation varies with the cosine of the angle of incidence?

• Arndt-Schultz Principle

• Law of Grotthus-Draper

• Cosine Law

• Inverse Square Law

According to the Arndt-Schultz Principle, a reaction occurs in body tissues only when the energy absorbed is:

• Sufficient to stimulate tissues

• High enough to produce heat

• Reflected back

• Insufficient

What is the main reason for contraindicating electromagnetic radiation in patients with pacemakers?

• Increased risk of infection

• It can interfere with pacemaker function

• It causes skin burns

• It lowers blood pressure

The electromagnetic spectrum is divided into two main zones, which are:

• Heat and Cold radiation

• Mechanical and Electrical energy

• Ionizing and Non-ionizing radiation

• Shortwave and Microwave

Which type of infrared radiation penetrates the dermis and reaches up to 5 mm deep?

• IRC

• IRB

• IRA

• IRD

What physiological effect does heat have on collagen tissues?

• Decreases elasticity

• Increases extensibility

• Causes muscle contraction

• Reduces circulation

Infrared radiation mainly results in which kind of physiological effect?

• Muscle contraction

• Pain

• Local vasodilatation

• Tissue contraction

Which of the following is a non-luminous source of infrared radiation?

• Luminous lamp

• Tungsten filament lamp

• Non-luminous lamp

• Sunlight