Physics Practice: Spectrum (Mock Test 3 - Advanced)
1. Which of the following best explains the mechanism of dispersion in a prism?
2. When a ray of white light enters a glass slab with parallel sides, which phenomenon occurs at the first surface?
3. Why is an impure spectrum usually obtained from a single slit and a prism setup?
4. Which electromagnetic radiation is used to detect "forged" currency notes or documents?
5. According to Rayleigh's law of scattering, the intensity of scattered light ($I$) is proportional to:
6. What happens to the speed of violet light compared to red light as it enters a glass prism from air?
7. Infrared radiations are detected by a thermopile because they produce a significant ________ effect.
8. A "Pure Spectrum" is one in which:
9. Which part of the electromagnetic spectrum has the highest frequency?
10. Why are "Danger" signals in traffic lights always red?
11. Ultraviolet radiations are absorbed by ________, protecting Earth from harmful effects.
12. The wavelength of Gamma rays is ________ compared to X-rays.
13. In which case is the deviation produced by a prism maximum?
14. Radiations used for satellite communication are:
15. The angle of deviation ($\delta$) for a ray passing through a prism depends on:
16. Clouds appear white because:
17. Which property remains constant for all electromagnetic waves in a vacuum?
18. Scattering is the process of ________ of light by particles like dust and air molecules.
19. If the wavelength of light is $\lambda$, then for very small particles, the intensity of scattering is proportional to:
20. The primary cause of the blue color of the clear sky is:
