(20 12? Information on an optical disc is usually read by a laser beam. If the laser beam is not perpendicular to the surface of the optical disc, light enters.

A, ① If the degree of light deflection is large, the refractive index and frequency are large, it is known that light is blue. The light is red. So, A is wrong.

B, according to V = CN, ① The higher the refractive index of light, the lower the speed of light in the medium, so B is wrong.

C, ① When the frequency of light is high, the wavelength is small. According to △ x = LD λ, ① the spacing of optical interference fringes is small. So, C is correct.

D, according to sinC= 1n, ① The higher the refractive index of light, the smaller the critical angle, so d is wrong.

So choose C.

Why can't Hangzhou apply for a catering business license

Brief introduction of Beijing Jinma building

What about Harbin Xindongsheng Mechanized Agricultural Equipment Manufacturing Co.

What are the free parks in Nanjing

Can I be reimbursed for all of the invoices that were issued twice a day at different times?

Measures for Decentralized Arrangement of Employment for Persons with Disabilities in Shanghai Municipality

Gaoping District The Wenshi Majia Pig Factory in Gaoping District of Nanchong City belongs to that street.

The value-added tax rate of catering service industry is 6%. Is the sales of moon cakes taxed at 17% or 6%?

Characteristics of folding movable partition wall Introduction of advantages of folding movable partition wall

What about Chengdu Niuyipin Catering Management Co., Ltd.?