Chapter 38: Q. 1 (page 1114)

Which metals in Table 38.1 exhibit the photoelectric effect for (a) light with $λ = 400 nm$ and (b) light with $λ = 250 nm$ ?

Short Answer

Expert verified

a. Sodium

b. Iron.

Step by step solution

Part (a) Step 1: Given information

We have given,

$λ = 400 nm$

We have to find the metal for the photo electric effect.

Simplify

For $λ = 400 nm$ , the energy will be

$E = \frac{hc}{λ} E = \frac{1240 eV . nm}{400 nm} E = 3.1 eV$

Then we can say that the sodium will be the metal for which we need the $400 nm$ wavelength source light.

Part (b) Step 1: Given information

We have given,

$λ = 250 nm$

We have to find the metal for the photoelectric effect.

Simplify

The energy will be given by,

$E = \frac{hc}{λ} E = \frac{1240 eV . nm}{250 nm} E = 4.96 eV$

For this much energy we need the iron metal.

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Which metals in Table 38.1 exhibit the photoelectric effect for (a) light with $λ = 400 nm$ and (b) light with $λ = 250 nm$ ?

Short Answer

Step by step solution

Part (a) Step 1: Given information

Simplify

Part (b) Step 1: Given information

Simplify

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Which metals in Table 38.1 exhibit the photoelectric effect for (a) light withλ=400nm and (b) light with λ=250nm?

Short Answer

Step by step solution

Part (a) Step 1: Given information

Simplify

Part (b) Step 1: Given information

Simplify

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Physics Textbooks

Dynamics

Torque and Rotational Motion

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Study anywhere. Anytime. Across all devices.

Which metals in Table 38.1 exhibit the photoelectric effect for (a) light with $λ = 400 nm$ and (b) light with $λ = 250 nm$ ?