1. Expert Analysis: A monochromatic ray of light enters a prism. If the angle of incidence is increased gradually, the angle of deviation initially decreases and then increases. At the position of minimum deviation ($\delta_m$), which condition is satisfied?
2. Data-Based: The wavelength of a certain electromagnetic radiation is $10 \text{ \AA}$. In which part of the electromagnetic spectrum does it lie?
3. Clinical Logic: Infrared lamps are used for "Fomentation" (heat treatment) because:
4. Experimental Setup: When white light is passed through a prism and a second identical prism is placed in an inverted position behind the first, the resultant light is:
5. Which of the following statements about scattering is INCORRECT?
6. A glass prism of refractive index $1.5$ is immersed in water ($\mu = 1.33$). The angle of minimum deviation for a ray of light will:
7. Which radiation is classified as "soft" or "hard" based on its energy and penetrating power?
8. Data-Logic: If the frequency of an EM wave is $3 \times 10^{14} \text{ Hz}$, its wavelength in vacuum is: ($c = 3 \times 10^8 \text{ m/s}$)
9. Why is the spectrum of Ultraviolet light not visible on an ordinary glass screen but visible on a screen coated with zinc sulphide?
10. The main reason for the "Reddish" appearance of the Moon during a total lunar eclipse is:
11. A medium is said to be "dispersive" because:
12. Microwaves are better than radio waves for satellite communication because they:
13. The deviation produced by a prism is dependent on the "Angle of Prism". If the angle of prism increases, the deviation generally:
14. Which radiation is produced by an "electronic transition" in the inner shells of an atom?
15. In a spectrometer, a ________ is used to obtain a parallel beam of light before dispersion.
16. The "heat capacity" of infrared rays is due to their large ________.
17. Expert Observation: A prism is placed in a darkened room. A beam of white light is incident. If a blue filter is placed in front of the source, what is seen on the screen?
18. Total Internal Reflection occurs in a prism when the angle of incidence inside is ________ than the critical angle.
19. Cosmic rays, Gamma rays, and X-rays are similar because they all have high ________ and low ________.
20. The color of light is fundamentally associated with its ________.
