Physics Practice: Spectrum (Mock Test 5 - Ultimate Comprehensive)
1. Which constituent color of white light undergoes the least deviation through a glass prism?
2. The wavelength range of the electromagnetic spectrum used for mobile phone communication is:
3. Infrared radiations are strongly absorbed by ________, making them useful for greenhouse heating.
4. According to Rayleigh's scattering law, which color of the sun's light is scattered most by air molecules?
5. Which of the following electromagnetic waves has the highest ionizing power?
6. The speed of light in glass is $2 \times 10^8 \text{ m/s}$. The refractive index of glass is: ($c = 3 \times 10^8 \text{ m/s}$)
7. To obtain a pure spectrum, which of the following is NOT required?
8. Ultraviolet radiations can cause ________ when human skin is exposed to them for long periods.
9. Frequency ($f$), speed ($v$) and wavelength ($\lambda$) are related as:
10. Fraunhofer lines are used to identify ________ in the Sun's atmosphere.
11. Which radiation is used for detecting cracks in metal castings?
12. At noon, the sun appears white because:
13. The invisible spectrum extending beyond the red end is:
14. Which color of light travels the fastest in a glass prism?
15. Microwaves have a wavelength range of approximately:
16. The synthesis of Vitamin D in human skin occurs in the presence of:
17. Which of the following has the highest wavelength?
18. Scattering occurs when light strikes particles whose size is ________ the wavelength of light.
19. In the vacuum, the ratio of the speed of Gamma rays to the speed of Radio waves is:
20. The primary cause of "Dispersion" is the ________ of light in a material medium.
