Register
Glass lenses are practically opaque to an emission source with the wavelength shorter than 400nm. (True or False)
24,313 views
13 votes
13 votes
Glass lenses are practically opaque to an emission source with the wavelength shorter than 400nm. (True or False)

User Eudis Duran
by
2.9k points

1 Answer

19 votes
19 votes

Answer:

the statement is TRUE

Step-by-step explanation:

Most lenses are made of glass that has a strong absorption below 400 nm,

Only special evaporation lenses are made of quartz and fused silica which has a high absorption below 200 nm.

therefore the statement is TRUE

User Ifozest
by
2.4k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

1.6m questions

2.0m answers

Other Questions

After a light turns green , Lesly accelerates to 120 km/hr over 100 meters . What is her acceleration in m/s^2
If a constant fotce of 490 newtons is applied to an object and it proceeds to accelerate in the opposjte direction at 9.8 meters per second, every second, what is its mass?
1. if i start with 48 ml of water in a graduated cylinder, after submerging an object the water level rises to 63 ml, what is the volume of the object. 2. if i start with 36 ml of water in a graduated
A scientist uses a camera to study the stars. How would the scientist most likely use this technology? -to replace all of the old data about stars -to predict the star count over a broad area -to write
a dog is running around chasing his tail using a force of 30N. The dog has a mass of 5 kg. what is the dogs acceleration?
Link Copied!