Answer:
123.18 nm
Explanation:
Given:
- Refractive index of the glass=1.5
- Index of magnesium fluoride=1.38
- Wavelength of the light =680 nm
Let t be the thickness of the film. The relation between the wavelength of light in film and thickness of the film in order to have no reflection is given by
Now According to question we have
where n is the refractive index of the film.
Now thickness t is given by
Hence the thickness of the film is calculated in order to have no reflection.
Answer:
132.64m/s
Explanation:
Averagevelocity= distance/time
From the question, the distance d = 825m
time t = 6.22 secs
Using the above formula
We have
average velocity = 825/6.22
= 132.64m/s
D. Is leaf like and protects the developing flower.
Answer:
Both technicians are correct
Explanation:
Insulated rubber gloves or lineman’s gloves are a major requirement to ensure safety when working with high voltage parts of the hybrid electric vehicles because rubber is an insulator i.e. it does not allow direct contact of electricity with the body. These gloves are really important because these gloves can protect the technicians from electric shocks servicing the high voltage system on hybrid electric vehicles. It needs to be ensured that the gloves are of pure rubber and have no holes or cuts to ensure complete insulation. These gloves are also called class “0” gloves or gloves rated at 1000 V are used for this.
Similarly there are methods to shut off the high voltage to components and circuits in hybrid cars. These methods include but are not limited to:
• Turning the ignition off
• Disconnecting the 12-volt auxiliary battery
• Removing the main fuse, relay, or HV plug
So both the technicians are correct