X-rays can be used to : 1. inspect welded joints between two metal parts of a machine. 2. study structure of crystals. Select the answer using the code given below :

With reference to the first-man made Ruby Laser, which of the following statement/s is/are correct? (1) Ruby Laser produced pulses of blue light. (2) Ruby Laser produced pulses of red light. Select t…

Consider the following and arrange these in increasing order of frequency: (I) X-rays (II) Visible rays (III) Infrared rays (IV) Radio waves Select the correct answer using the code given below:

With reference to 'LiFi', recently in the news, which of the following statements is/are correct? 1. It uses light as the medium for high-speed data transmission. 2. It is a wireless technology and i…

Which one of the following is used for determining the structure of crystal?

With reference to Visible Light Communication (VLC) technology, which of the following statements are correct? 1. VLC uses electromagnetic spectrum wavelengths 375 to 780 nm. 2. VLC is known as long-…