Q18DQ - University Physics with Modern Physics

Question

A hologram is made using 600-nm light and then viewed by using white light from an incandescent bulb. What will be seen? Explain.

Step-by-Step Solution

Answer

The image will be clear for some angles and distorted and blurry for others.

Step 1: Given Data

Using interference effects, we can record and reproduce three-dimensional images. This phenomenon is known as Holography. To make a hologram two things are required: a cohered light source, and extreme mechanical stability.

Step 2: Hologram by bulb light

The radius of the m^th concentric fringe of each hologram is given by

 

$r_m=\sqrt{2m\lambda b_0}$ 

 

Where, λ = wavelength of the light used to construct the hologram.

 

As we know a bulb emits a range of wavelengths due to which the image produced by the hologram will be distorted. Apart from that, the visible spectrum produced by a bulb also contains light of the wavelength   which will contribute towards making the perfect image of hologram due to which ultimately a distorted and blurry image will form for some angles.

 

Therefore, A distorted and blurry image will form for some angles.