Does the concept of photon energy shed any light (no punintended)on the question of why X rays are so much more penetrating than visible light? Explain.

Consider the following statement about visible light, UV light and X-rays: The wavelength of visible light is more than that of X-rays. 2. The energy of X-rays photons is higher than that of UV light photons. 3. The energy of UV light photons is less than that of visible light photons. Which of the statements given above is/are correct?

When a sufficient number of visible light photons strike a piece of photographic film, the film becomes exposed. An X-ray photon is more energetic than a visible light photon. Yet, most photographic films are not exposed by the X-ray machines used at airport security check points. Explain what these observations imply about the number of photons emitted by the X-ray machines.

Which of the following is correct regarding X-rays (i) X-rays are electromagnetic radiation (photon) of short wavelength. X-rays move in straight lines in vacuum at a speed equal to that of light (ii) Since X-rays are charge-less particles and therefore not deflected by electric or magnetic fields (iii) X-rays are diffracted by crystals in accordance with Bragg's law. The Bragg's law states 2 d sin theta=n lambda , where n is integer. theta is the angle at which X-ray is incident on the plane of atoms, d: distance between the parallel planes of atom (iv) X-rays affect a photographic plate more strongly than visible light

Two source of light emit X - rays of wavelenght 1 nm and visible light of wavelength 500 nm respectively . Both the source emit light of the same power 200 W. The ratio of the number density of photons of X - rays to the number density of photons of the visible light of the given wavelengths

(a) When monochromatic light is incident on a surface separating two media, the reflected and refracted light both have the same frequency as the incident frequency. Explain why ? (bb) When light travels from a rarer to a denser medium, the speed decreases. Does the reduction in speed imply a reduction in the energy carried by the light wave? c) In the wave picture of light, intensity of light is determined by the square of the amplitude of the wave. What determines the intensity of light in the photon picture of light.

Figure 2.39 shows a photograph that illustrates the kind of interference fringes that can result when white light, which is a mixture of all colors, is used in Young's experiment, Except for the central fringe, which is white, the bright frings are a rainbow of colors. Why does Young's experiment separate white light into the constituent colors? In any group of colored fringes, such as the two singled out in the figure, why is red farther out from the central fringe than green is? And finally, why is the central fringe white rather than colored?

X-rays are electromagnetic radiations of wavelength greater than that of visible light.

Explain why does a concave lens diverges the rays of light falling on it.

There are two sources of light, each emitting with a power of 100W. One emits X-rays of wavelength 1nm and the other visible light at 500nm. Find the ratio of number of photons of X-rays to the photons of visible light of the given wavelength?