Glass panes are opaque to a certain type of radiation that is important in ozone

Question

Glass panes are opaque to a certain type of radiation that is important in ozone layer reactions and it can cause sunburn. What type of radiation is it. Gamma X-ray Ultraviolet Microwave The human eye is sensitive to light with wavelength up to 750 nm. What is the frequency of radiation at this wavelength?? (1 nm = 10-9 m and c= 3.00 Times 108 m/s) 8.5 Times 108 Hz 4.0 Times 1014 Hz 1.8 Times 108 Hz 7.7 Times 1014 Hz Monochromatic light hits a piece of glass. Assuming the frequency remains constant, what happens to the wavelength in the glass as the index of refraction decreases? Decreases Increases Approaches 3 Times 108m/s Remains constant If the wavelength of a monochromatic source is 600 nm (1nm = 10-9m) in vacuum, what is the wavelength from the same source when it passes through a liquid where the speed of light is 2.00 Times 108 m/s? (c = 3.0 Times 108 m/s) 612.5 nm 671 nm 400 nm 392 nm In Young's Double Slit experiment, both the wavelength and the slit separation are increased by 25%. What happens to the distance between two adjacent bright fringes? It decreases by 50% It increases by 50% The distance increases by 25% The distance stays the same because h = W lambda/d

Explanation / Answer

24:- c ultraviolet

25:- Frequency= c/Wavelength = 4* 10^14 hz. SO, option B is correct.

26:- B increases as the wavelength= c/frequency and c increases with decrease in refractive index.

27:- C 400nm (use formula wavelength= c/frequency and frequency remains unchanged in both cases.)

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