Optics is the branch of physics which involves the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Optics usually describes the behaviour of visible, ultraviolet, and infrared light. Because light is an electromagnetic wave, other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties.

Most optical phenomena can be accounted for using the classical electromagnetic description of light. Complete electromagnetic descriptions of light are, however, often difficult to apply in practice. Practical optics is usually done using simplified models. The most common of these, geometric optics, treats light as a collection of rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive model of light, which includes wave effects such as diffraction and interference that cannot be accounted for in geometric optics. Historically, the ray-based model of light was developed first, followed by the wave model of light. Progress in electromagnetic theory in the 19th century led to the discovery that light waves were in fact electromagnetic radiation.

Some phenomena depend on the fact that light has both wave-like and particle-like properties. Explanation of these effects requires quantum mechanics. When considering light's particle-like properties, the light is modelled as a collection of particles called "photons". Quantum optics deals with the application of quantum mechanics to optical systems.

Optical science is relevant to and studied in many related disciplines including astronomy, various engineering fields, photography, and medicine (particularly ophthalmology and optometry). Practical applications of optics are found in a variety of technologies and everyday objects, including mirrors, lenses, telescopes, microscopes, lasers, and fibre optics.

College of International Education has 50 full-time language teachers and about 40 part-time teachers, of which 2 are professors, 15 are associate professors and 9 master tutors. 32% teachers have doctoral degree. 80% have overseas teaching experience and certificate of Teaching Chinese as foreign Language (advanced level). CIE has undertaken various programs funded by Confucius Institution, China’s Education Ministry or Beijing Municipal Education Commission etc. Research results published on Chinese Teaching in the World and other academic journals.

• Under age of 40;

• Bachelor degree or above;

• HSK 5 or equivalent.

1. Application Form

2. Photocopy of valid passport

With name, passport number & expiration date, and photo included

3. Passport photo

A recent passport-sized photo of the applicant

4. Undergraduate sAchool transcript

5. Bachelor's degree diploma

Graduation certificate in languages other than Chinese or English should be translated into Chinese or English and be certified by notarization.

6. Two letters of recommendation

From professor or associate professor or equivalents

7. Study Plan

8. Certificate of HSK

Copy of HSK grade 5 transcript.