Answer:
17= A
18= B
Hopefully this helps !
1. Secured card
2. Prepaid card
Answer:
E = 4 × 10⁻¹⁹ J
Explanation:
It is given that,
Wavelength = 510 nm
Frequency = 
We need to find the approximate energy of one photon of this light. The formula for the energy of a photon is given by :

or
E = 4 × 10⁻¹⁹ J
Hence, the correct option is (d).